diff --git a/App.js b/App.js
index fb2944e..1d85452 100644
--- a/App.js
+++ b/App.js
@@ -1,8 +1,8 @@
-import { useEffect, useState } from "react";
-import { ActivityIndicator, View } from "react-native";
-import { NavigationContainer } from "@react-navigation/native";
-import { createNativeStackNavigator } from "@react-navigation/native-stack";
-import { SafeAreaProvider } from "react-native-safe-area-context";
+import {useEffect, useState} from "react";
+import {ActivityIndicator, View} from "react-native";
+import {NavigationContainer} from "@react-navigation/native";
+import {createNativeStackNavigator} from "@react-navigation/native-stack";
+import {SafeAreaProvider} from "react-native-safe-area-context";
 import LoginScreen from "./src/components/screens/LoginScreen";
 import RegisterScreen from "./src/components/screens/RegisterScreen";
 import TeamScreen from "./src/components/screens/TeamScreen";
@@ -12,12 +12,11 @@ import GameSettingsScreen from "./src/components/screens/GameSettingsScreen";
 import DepartmentSettingsScreen from "./src/components/screens/DepartmentSettingsScreen";
 import PlayersScreen from "./src/components/screens/PlayersScreen";
 import ExpandedMapScreen from "./src/components/screens/ExpandedMapScreen";
-import GameSelectionScreen from "./src/components/screens/GameSelectionScreen";
 import GlobalEventsScreen from "./src/components/screens/global/GlobalEventsScreen";
 import GlobalMapScreen from "./src/components/screens/global/GlobalMapScreen";
 import GlobalCacheViewScreen from "./src/components/screens/global/GlobalCacheViewScreen";
 import GlobalLeaderboardScreen from "./src/components/screens/global/GlobalLeaderboardScreen";
-import { loadSession } from "./src/hooks/SessionStore";
+import {loadSession} from "./src/hooks/SessionStore";
 
 const RootStack = createNativeStackNavigator();
 const AuthStackNav = createNativeStackNavigator();
@@ -26,7 +25,7 @@ const AdminStackNav = createNativeStackNavigator();
 
 const screenOptions = {
   headerShown: false,
-  contentStyle: { backgroundColor: "#ffffff" },
+  contentStyle: { backgroundColor: "#1e1e2e" },
 };
 
 const AuthStack = () => (
@@ -40,10 +39,6 @@ const AuthStack = () => (
 
 const GameStack = () => (
   <GameStackNav.Navigator screenOptions={screenOptions}>
-    <GameStackNav.Screen
-      name="GameSelectionScreen"
-      component={GameSelectionScreen}
-    />
     <GameStackNav.Screen name="MapScreen" component={MapScreen} />
     <GameStackNav.Screen name="TeamScreen" component={TeamScreen} />
     <GameStackNav.Screen
@@ -73,14 +68,14 @@ const GameStack = () => (
 
 const AdminStack = () => (
   <AdminStackNav.Navigator screenOptions={screenOptions}>
-    <AdminStackNav.Screen
-      name="GameSelectionScreen"
-      component={GameSelectionScreen}
-    />
     <AdminStackNav.Screen
       name="GameSettingsScreen"
       component={GameSettingsScreen}
     />
+    <AdminStackNav.Screen
+      name="DepartmentSettingsScreen"
+      component={DepartmentSettingsScreen}
+    />
     <AdminStackNav.Screen name="MapScreen" component={MapScreen} />
     <AdminStackNav.Screen
       name="LeaderboardScreen"
@@ -106,15 +101,6 @@ const AdminStack = () => (
       component={GlobalLeaderboardScreen}
     />
   </AdminStackNav.Navigator>
-    <AdminStackNav.Navigator screenOptions={screenOptions}>
-        <AdminStackNav.Screen name="GameSettingsScreen" component={GameSettingsScreen}/>
-        <AdminStackNav.Screen name="DepartmentSettingsScreen" component={DepartmentSettingsScreen}/>
-        <AdminStackNav.Screen name="MapScreen" component={MapScreen}/>
-        <AdminStackNav.Screen name="LeaderboardScreen" component={LeaderboardScreen}/>
-        <AdminStackNav.Screen name="PlayersScreen" component={PlayersScreen}/>
-        <AdminStackNav.Screen name="ExpandedMapScreen" component={ExpandedMapScreen}/>
-        <AdminStackNav.Screen name="TeamScreen" component={TeamScreen}/>
-    </AdminStackNav.Navigator>
 );
 
 export const App = () => {
diff --git a/assets/icons/events-icon.png b/assets/icons/events-icon.png
new file mode 100644
index 0000000..c0f1d79
Binary files /dev/null and b/assets/icons/events-icon.png differ
diff --git a/src/components/UI/Button.js b/src/components/UI/Button.js
index efa099d..111ceb8 100644
--- a/src/components/UI/Button.js
+++ b/src/components/UI/Button.js
@@ -36,6 +36,7 @@ const styles = StyleSheet.create({
     flex: 1,
     flexDirection: "row",
     gap: 5,
+    marginHorizontal: 4,
   },
   label: {
     fontSize: 16,
diff --git a/src/components/UI/CodeJoinRow.js b/src/components/UI/CodeJoinRow.js
new file mode 100644
index 0000000..1f94daf
--- /dev/null
+++ b/src/components/UI/CodeJoinRow.js
@@ -0,0 +1,75 @@
+import {StyleSheet, TextInput, View} from 'react-native';
+import {Button} from './Button';
+
+const CodeJoinRow = ({
+  value,
+  onChange,
+  placeholder,
+  buttonLabel = 'Join',
+  onSubmit,
+  disabled = false,
+  style,
+}) => {
+  //   Initialisation -------------
+  //   State ----------------------
+  //   Handlers -------------------
+  //   View -----------------------
+
+  return (
+    <View style={[styles.inputRow, style]}>
+      <TextInput
+        style={[styles.codeInput, disabled && styles.inputDisabled]}
+        placeholder={placeholder}
+        placeholderTextColor="#9ca3af"
+        value={value}
+        onChangeText={(text) => onChange(text.toUpperCase())}
+        autoCapitalize="characters"
+        editable={!disabled}
+      />
+      <Button
+        label={buttonLabel}
+        onClick={onSubmit}
+        styleButton={styles.joinButton}
+        styleLabel={styles.joinLabel}
+        disabled={disabled}
+      />
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  inputRow: {
+    flexDirection: 'row',
+    gap: 10,
+    marginBottom: 15,
+    width: '100%',
+    paddingHorizontal: 20,
+  },
+  codeInput: {
+    flex: 1,
+    borderWidth: 1,
+    borderColor: '#45475a',
+    borderRadius: 8,
+    paddingHorizontal: 12,
+    paddingVertical: 10,
+    fontSize: 16,
+    color: '#cdd6f4',
+    backgroundColor: '#313244',
+  },
+  inputDisabled: {
+    opacity: 0.5,
+  },
+  joinButton: {
+    backgroundColor: '#bd93f9',
+    borderColor: '#bd93f9',
+    flex: 0,
+    paddingHorizontal: 20,
+  },
+  joinLabel: {
+    color: '#1e1e2e',
+    fontWeight: '600',
+  },
+});
+
+export default CodeJoinRow;
+
diff --git a/src/components/layout/BottomNavbar.js b/src/components/layout/BottomNavbar.js
index 3a7ab1a..bd17f0d 100644
--- a/src/components/layout/BottomNavbar.js
+++ b/src/components/layout/BottomNavbar.js
@@ -1,191 +1,130 @@
-import { Alert, Pressable, StyleSheet, Text, View } from "react-native";
-import { useSafeAreaInsets } from "react-native-safe-area-context";
-import { clearGameSession, getSession } from "../../hooks/SessionStore";
-import API, { API_BASE_URL } from "../API/API";
+import {Alert, Image, Pressable, StyleSheet, Text, View} from 'react-native';
+import {useSafeAreaInsets} from 'react-native-safe-area-context';
+import {clearGameSession, clearGlobalSession, getSession, setSessionMode} from '../../hooks/SessionStore';
+import API, {API_BASE_URL} from '../API/API';
+import {GAME_MODE} from '../../utils/gameConstants';
+
+const iconMap = {
+  Settings: require('../../../assets/icons/settings-icon.png'),
+  Events: require('../../../assets/icons/events-icon.png'),
+  Map: require('../../../assets/icons/Map-icon.png'),
+  Leaderboard: require('../../../assets/icons/Leaderboard-icon.png'),
+  Team: require('../../../assets/icons/Teams-icon.png'),
+  Players: require('../../../assets/icons/Teams-icon.png'),
+};
 
-const BottomNavbar = ({ navigation, routeName }) => {
-  //   Initialisation ------------
 const BottomNavbar = ({navigation, routeName, routeParams}) => {
-//   Initialisation ------------
+  //   Initialisation ------------
 
   const insets = useSafeAreaInsets();
   const session = getSession();
+  const inGame = Boolean(session.currentGid);
+  const isGlobalMode = !session.isBusiness && session.currentGameMode === GAME_MODE.GLOBAL;
 
-  const adminTabs = [
-    {
-      label: "Settings",
-      route: "GameSettingsScreen",
-      onPress: () => navigation.navigate("GameSettingsScreen"),
-    },
-    {
-      label: "Map",
-      route: "MapScreen",
-      onPress: () => navigation.navigate("MapScreen"),
-    },
-    {
-      label: "Players",
-      route: "PlayersScreen",
-      onPress: () => navigation.navigate("PlayersScreen"),
-    },
-    {
-      label: "Leaderboard",
-      route: "LeaderboardScreen",
-      onPress: () => navigation.navigate("LeaderboardScreen"),
-    },
-    {
-      label: "Games",
-      route: "GameSelectionScreen",
-      onPress: () => navigation.navigate("GameSelectionScreen"),
-    },
-    {
-      label: "Global",
-      route: "GlobalEventsScreen",
-      onPress: () => navigation.navigate("GlobalEventsScreen"),
-    },
-  ];
-
-  const playerTabs = [
-    {
-      label: "Team",
-      route: "TeamScreen",
-      onPress: () => navigation.navigate("TeamScreen"),
-    },
-    {
-      label: "Map",
-      route: "MapScreen",
-      onPress: () => navigation.navigate("MapScreen"),
-    },
-    {
-      label: "Leaderboard",
-      route: "LeaderboardScreen",
-      onPress: () => navigation.navigate("LeaderboardScreen"),
-    },
-    {
-      label: "Games",
-      route: "GameSelectionScreen",
-      onPress: () => navigation.navigate("GameSelectionScreen"),
-    },
-    {
-      label: "Global",
-      route: "GlobalEventsScreen",
-      onPress: () => navigation.navigate("GlobalEventsScreen"),
-    },
-
-    { label: "Leave", route: "__leave__", onPress: () => handleLeaveGame() },
-  ];
-
-  const tabs = session.isAcceptedAdmin ? adminTabs : playerTabs;
-    const selectedDepartment = routeName === 'DepartmentSettingsScreen' && routeParams?.SGid
-        ? {SGid: routeParams.SGid, SubGroupName: routeParams.SubGroupName || routeParams.selectedDepartmentName || 'Department'}
-        : null;
-
-    const adminTabs = [
-        {label: 'Settings', route: 'GameSettingsScreen', onPress: () => navigation.navigate('GameSettingsScreen')},
-        {
-            label: 'Map',
-            route: 'MapScreen',
-            onPress: () => navigation.navigate('MapScreen', {
-                selectedDepartmentSGid: null,
-                selectedDepartmentName: null,
-            }),
-        },
-        {
-            label: 'Players',
-            route: 'PlayersScreen',
-            onPress: () => navigation.navigate('PlayersScreen', selectedDepartment ? {department: selectedDepartment} : undefined),
-        },
-        {
-            label: 'Leaderboard',
-            route: 'LeaderboardScreen',
-            onPress: () => navigation.navigate('LeaderboardScreen', selectedDepartment ? {department: selectedDepartment} : undefined),
-        },
-    ];
-
-    // Only show the Leave tab when the player is actually in a game
-    const inGame = Boolean(session.currentGid);
-
-    const playerTabs = [
-        {label: 'Team', route: 'TeamScreen', onPress: () => navigation.navigate('TeamScreen')},
-        {label: 'Map', route: 'MapScreen', onPress: () => navigation.navigate('MapScreen')},
-        {label: 'Leaderboard', route: 'LeaderboardScreen', onPress: () => navigation.navigate('LeaderboardScreen')},
-        ...(inGame ? [{label: 'Leave', route: '__leave__', onPress: () => handleLeaveGame()}] : []),
-    ];
-
-    const tabs = session.isAcceptedAdmin ? adminTabs : playerTabs;
-    const pendingTabs = [
-        {label: 'Pending', route: 'TeamScreen', onPress: () => navigation.navigate('TeamScreen')},
-        ...(inGame ? [{label: 'Leave', route: '__leave__', onPress: () => handleLeaveGame()}] : []),
-    ];
-    const visibleTabs = (session.isPendingAdmin && !session.isAcceptedAdmin) ? pendingTabs : tabs;
+  const selectedDepartment = routeName === 'DepartmentSettingsScreen' && routeParams?.SGid
+    ? {
+      SGid: routeParams.SGid,
+      SubGroupName: routeParams.SubGroupName || routeParams.selectedDepartmentName || 'Department',
+    }
+    : null;
 
   //   State ----------------------
   //   Handlers -------------------
 
   const handleLeaveGame = () => {
-    Alert.alert("Leave Game", "Are you sure you want to leave this game?", [
-      { text: "Cancel", style: "cancel" },
+    Alert.alert('Leave Game', 'Are you sure you want to leave this game?', [
+      {text: 'Cancel', style: 'cancel'},
       {
-        text: "Leave",
-        style: "destructive",
+        text: 'Leave',
+        style: 'destructive',
         onPress: async () => {
-          const s = getSession();
-          const endpoint = `${API_BASE_URL}/subgroup-memberships?Uid=${s.currentUid}&Gid=${s.currentGid}`;
-          const res = await API.get(endpoint);
-          if (res.isSuccess && res.result.length > 0) {
-            await API.delete(
-              `${API_BASE_URL}/subgroup-memberships/${res.result[0].id}`,
-            );
+          const currentSession = getSession();
+          const endpoint = `${API_BASE_URL}/subgroup-members?Uid=${currentSession.currentUid}&Gid=${currentSession.currentGid}`;
+          const response = await API.get(endpoint);
+          if (response.isSuccess && response.result.length > 0) {
+            await API.delete(`${API_BASE_URL}/subgroup-members/${response.result[0].id}`);
           }
           clearGameSession();
-          navigation.reset({ index: 0, routes: [{ name: "Game" }] });
+          const rootNav = navigation.getParent() || navigation;
+          rootNav.reset({index: 0, routes: [{name: 'Game'}]});
         },
       },
     ]);
   };
-    const handleLeaveGame = () => {
-        Alert.alert('Leave Game', 'Are you sure you want to leave this game?', [
-            {text: 'Cancel', style: 'cancel'},
-            {
-                text: 'Leave',
-                style: 'destructive',
-                onPress: async () => {
-                    const s = getSession();
-                    const endpoint = `${API_BASE_URL}/subgroup-members?Uid=${s.currentUid}&Gid=${s.currentGid}`;
-                    const res = await API.get(endpoint);
-                    if (res.isSuccess && res.result.length > 0) {
-                        await API.delete(`${API_BASE_URL}/subgroup-members/${res.result[0].id}`);
-                    }
-                    clearGameSession();
-                    navigation.reset({index: 0, routes: [{name: 'Game'}]});
-                },
-            },
-        ]);
-    };
+
+  const handleExitGlobal = () => {
+    clearGlobalSession();
+    setSessionMode(session.currentGid ? GAME_MODE.REGULAR : null);
+    navigation.navigate('MapScreen');
+  };
+
+  const adminTabs = [
+    {label: 'Settings', route: 'GameSettingsScreen', onPress: () => navigation.navigate('GameSettingsScreen')},
+    {
+      label: 'Map',
+      route: 'MapScreen',
+      onPress: () => navigation.navigate('MapScreen', {
+        selectedDepartmentSGid: null,
+        selectedDepartmentName: null,
+      }),
+    },
+    {
+      label: 'Players',
+      route: 'PlayersScreen',
+      onPress: () => navigation.navigate('PlayersScreen', selectedDepartment ? {department: selectedDepartment} : undefined),
+    },
+    {
+      label: 'Leaderboard',
+      route: 'LeaderboardScreen',
+      onPress: () => navigation.navigate('LeaderboardScreen', selectedDepartment ? {department: selectedDepartment} : undefined),
+    },
+  ];
+
+  const playerTabs = [
+    {label: 'Team', route: 'TeamScreen', onPress: () => navigation.navigate('TeamScreen')},
+    {label: 'Map', route: 'MapScreen', onPress: () => navigation.navigate('MapScreen')},
+    {label: 'Leaderboard', route: 'LeaderboardScreen', onPress: () => navigation.navigate('LeaderboardScreen')},
+    ...(inGame ? [{label: 'Leave', route: '__leave__', onPress: handleLeaveGame}] : []),
+  ];
+
+  const pendingTabs = [
+    {label: 'Pending', route: 'TeamScreen', onPress: () => navigation.navigate('TeamScreen')},
+    ...(inGame ? [{label: 'Leave', route: '__leave__', onPress: handleLeaveGame}] : []),
+  ];
+
+  const globalTabs = [
+    {label: 'Events', route: 'GlobalEventsScreen', onPress: () => navigation.navigate('GlobalEventsScreen')},
+    {label: 'Map', route: 'GlobalMapScreen', onPress: () => navigation.navigate('GlobalMapScreen')},
+    {label: 'Leaderboard', route: 'GlobalLeaderboardScreen', onPress: () => navigation.navigate('GlobalLeaderboardScreen')},
+    {label: 'Exit', route: '__exit_global__', onPress: handleExitGlobal},
+  ];
+
+  let visibleTabs = session.isAcceptedAdmin ? adminTabs : playerTabs;
+  if (session.isPendingAdmin && !session.isAcceptedAdmin) {
+    visibleTabs = pendingTabs;
+  }
+  if (isGlobalMode) {
+    visibleTabs = globalTabs;
+  }
 
   //   View -----------------------
 
   return (
-    <View style={[styles.container, { paddingBottom: insets.bottom }]}>
-      {tabs.map((tab) => {
+    <View style={[styles.container, {paddingBottom: insets.bottom}]}>
+      {visibleTabs.map((tab) => {
         const isActive = routeName === tab.route;
-        const isLeave = tab.route === "__leave__";
+        const isLeave = tab.route === '__leave__';
+        const isExitGlobal = tab.route === '__exit_global__';
+        const iconSource = iconMap[tab.label];
+
         return (
           <Pressable
             key={tab.label}
             onPress={tab.onPress}
-            style={[
-              styles.tab,
-              isActive && styles.tabActive,
-              isLeave && styles.tabLeave,
-            ]}
+            style={[styles.tab, isActive && styles.tabActive, (isLeave || isExitGlobal) && styles.tabLeave]}
           >
-            <Text
-              style={[
-                styles.tabText,
-                isActive && styles.tabTextActive,
-                isLeave && styles.tabTextLeave,
-              ]}
-            >
+            {iconSource ? <Image source={iconSource} style={styles.icon} resizeMode="contain" /> : null}
+            <Text style={[styles.tabText, isActive && styles.tabTextActive, (isLeave || isExitGlobal) && styles.tabTextLeave]}>
               {tab.label}
             </Text>
           </Pressable>
@@ -199,97 +138,45 @@ const styles = StyleSheet.create({
   container: {
     minHeight: 64,
     borderTopWidth: 1,
-    borderTopColor: "#555555",
-    backgroundColor: "#4a4a4a",
-    flexDirection: "row",
-    alignItems: "center",
-    justifyContent: "space-around",
+    borderTopColor: '#45475a',
+    backgroundColor: '#313244',
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-around',
     paddingHorizontal: 8,
+    zIndex: 10,
   },
   tab: {
     flex: 1,
-    alignItems: "center",
-    justifyContent: "center",
-    paddingVertical: 12,
-    borderRadius: 8,
+    alignItems: 'center',
+    justifyContent: 'center',
+    paddingVertical: 8,
     marginHorizontal: 4,
+    gap: 4,
   },
   tabActive: {
-    backgroundColor: "#5c5c5c",
+    backgroundColor: '#45475a',
   },
   tabLeave: {
-    backgroundColor: "rgba(220,38,38,0.15)",
+    backgroundColor: 'rgba(217, 40, 0, 0.15)',
+  },
+  icon: {
+    width: 16,
+    height: 16,
+    opacity: 0.95,
   },
   tabText: {
-    color: "#d1d5db",
+    color: '#bac2de',
     fontSize: 12,
-    fontWeight: "600",
-    textAlign: "center",
+    fontWeight: '600',
+    textAlign: 'center',
   },
   tabTextActive: {
-    color: "#ffffff",
+    color: '#cdd6f4',
   },
   tabTextLeave: {
-    color: "#fca5a5",
+    color: '#ffffff',
   },
-    return (
-        <View style={[styles.container, {paddingBottom: insets.bottom}]}>
-            {visibleTabs.map((tab) => {
-                const isActive = routeName === tab.route;
-                const isLeave = tab.route === '__leave__';
-                return (
-                    <Pressable
-                        key={tab.label}
-                        onPress={tab.onPress}
-                        style={[styles.tab, isActive && styles.tabActive, isLeave && styles.tabLeave]}
-                    >
-                        <Text style={[styles.tabText, isActive && styles.tabTextActive, isLeave && styles.tabTextLeave]}>
-                            {tab.label}
-                        </Text>
-                    </Pressable>
-                );
-            })}
-        </View>
-    );
-};
-
-const styles = StyleSheet.create({
-    container: {
-        minHeight: 64,
-        borderTopWidth: 1,
-        borderTopColor: '#45475a',
-        backgroundColor: '#313244',
-        flexDirection: 'row',
-        alignItems: 'center',
-        justifyContent: 'space-around',
-        paddingHorizontal: 8,
-        zIndex: 10,
-    },
-    tab: {
-        flex: 1,
-        alignItems: 'center',
-        justifyContent: 'center',
-        paddingVertical: 12,
-        marginHorizontal: 4,
-    },
-    tabActive: {
-        backgroundColor: '#45475a',
-    },
-    tabLeave: {
-        backgroundColor: 'rgba(243, 139, 168, 0.15)',
-    },
-    tabText: {
-        color: '#bac2de',
-        fontSize: 12,
-        fontWeight: '600',
-        textAlign: 'center',
-    },
-    tabTextActive: {
-        color: '#cdd6f4',
-    },
-    tabTextLeave: {
-        color: '#D92800',
-    },
 });
 
 export default BottomNavbar;
diff --git a/src/components/layout/Screen.js b/src/components/layout/Screen.js
index 8311165..8c60b9f 100644
--- a/src/components/layout/Screen.js
+++ b/src/components/layout/Screen.js
@@ -1,11 +1,11 @@
-import { StatusBar } from "expo-status-bar";
-import { StyleSheet, View } from "react-native";
-import { useNavigation, useRoute } from "@react-navigation/native";
-import { useSafeAreaInsets } from "react-native-safe-area-context";
-import TopNavbar from "./TopNavbar";
-import BottomNavbar from "./BottomNavbar";
+import {StatusBar} from 'expo-status-bar';
+import {StyleSheet, View} from 'react-native';
+import {useNavigation, useRoute} from '@react-navigation/native';
+import {useSafeAreaInsets} from 'react-native-safe-area-context';
+import TopNavbar from './TopNavbar';
+import BottomNavbar from './BottomNavbar';
 
-const Screen = ({ children, style, showBack = false }) => {
+const Screen = ({children, style, showBack = false}) => {
   //   Initialisation -------------
 
   const navigation = useNavigation();
@@ -13,26 +13,25 @@ const Screen = ({ children, style, showBack = false }) => {
   const insets = useSafeAreaInsets();
 
   const titleMap = {
-    LeaderboardScreen: "Leaderboard",
-    TeamScreen: "Current Team",
-    MapScreen: "Map",
-    GameSettingsScreen: "Game Settings",
-    GameSelectionScreen: "Games",
-    DepartmentSettingsScreen: "Department Settings",
-    PlayersScreen: "Players",
-    ExpandedMapScreen: "Map View",
-    GlobalEventsScreen: "Global Events",
-    GlobalMapScreen: "Global Map",
-    GlobalCacheViewScreen: "Cache Details",
-    GlobalLeaderboardScreen: "Global Leaderboard",
+    LeaderboardScreen: 'Leaderboard',
+    TeamScreen: 'Current Team',
+    MapScreen: 'Map',
+    GameSettingsScreen: 'Game Settings',
+    GameSelectionScreen: 'Games',
+    DepartmentSettingsScreen: 'Department Settings',
+    PlayersScreen: 'Players',
+    ExpandedMapScreen: 'Map View',
+    GlobalEventsScreen: 'Global Events',
+    GlobalMapScreen: 'Global Map',
+    GlobalCacheViewScreen: 'Cache Details',
+    GlobalLeaderboardScreen: 'Global Leaderboard',
   };
 
   //   State ----------------------
 
   const routeName = route.name;
-  const isAuthScreen =
-    routeName === "LoginScreen" || routeName === "RegisterScreen";
-  const pageTitle = titleMap[routeName] || "Treasure Hunt";
+  const isAuthScreen = routeName === 'LoginScreen' || routeName === 'RegisterScreen';
+  const pageTitle = titleMap[routeName] || 'Treasure Hunt';
 
   //   Handlers -------------------
   //   View -----------------------
@@ -56,9 +55,12 @@ const Screen = ({ children, style, showBack = false }) => {
       )}
       <View style={[styles.content, style]}>{children}</View>
       {!isAuthScreen && (
-        <BottomNavbar navigation={navigation} routeName={routeName} />
+        <BottomNavbar
+          navigation={navigation}
+          routeName={routeName}
+          routeParams={route.params}
+        />
       )}
-      {!isAuthScreen && <BottomNavbar navigation={navigation} routeName={routeName} routeParams={route.params} />}
       <StatusBar style="light" />
     </View>
   );
diff --git a/src/components/layout/TopNavbar.js b/src/components/layout/TopNavbar.js
index b7bdd91..934120a 100644
--- a/src/components/layout/TopNavbar.js
+++ b/src/components/layout/TopNavbar.js
@@ -16,7 +16,8 @@ const TopNavbar = ({title, showBack, navigation}) => {
 
     const handleLogout = () => {
         clearSession();
-        navigation.reset({
+        const rootNav = navigation.getParent() || navigation;
+        rootNav.reset({
             index: 0,
             routes: [{name: 'Auth', params: {screen: 'LoginScreen'}}],
         });
diff --git a/src/components/screens/GameSelectionScreen.js b/src/components/screens/GameSelectionScreen.js
index 969d70a..bcb4b5a 100644
--- a/src/components/screens/GameSelectionScreen.js
+++ b/src/components/screens/GameSelectionScreen.js
@@ -1,8 +1,8 @@
-import { ScrollView, StyleSheet, Text, View } from "react-native";
+import {ScrollView, StyleSheet, Text, View} from "react-native";
 import Screen from "../layout/Screen";
 import Card from "../UI/Card";
-import { Button, ButtonTray } from "../UI/Button";
-import { getSession } from "../../hooks/SessionStore";
+import {Button, ButtonTray} from "../UI/Button";
+import {getSession} from "../../hooks/SessionStore";
 
 const GameSelectionScreen = ({ navigation }) => {
   // Initialisations ---------------------
@@ -34,10 +34,6 @@ const GameSelectionScreen = ({ navigation }) => {
     navigation.navigate("TeamScreen");
   };
 
-  const handleExplore = () => {
-    navigation.navigate("GlobalEventsScreen");
-  };
-
   // View --------------------------------
 
   return (
@@ -77,16 +73,8 @@ const GameSelectionScreen = ({ navigation }) => {
         <View style={styles.sectionBlock}>
           <Text style={styles.blockTitle}>Global Mode</Text>
           <Text style={styles.supportText}>
-            Explore all visible caches and live activity from the map.
+            Individual users can enter GLOBAL in the game join field to switch to Global mode.
           </Text>
-          <ButtonTray>
-            <Button
-              label="Explore"
-              onClick={handleExplore}
-              styleButton={styles.neutralButton}
-              styleLabel={styles.neutralButtonLabel}
-            />
-          </ButtonTray>
         </View>
       </ScrollView>
     </Screen>
@@ -170,15 +158,6 @@ const styles = StyleSheet.create({
     fontWeight: "600",
     fontSize: 14,
   },
-  neutralButton: {
-    backgroundColor: "#374151",
-    borderColor: "#374151",
-    maxWidth: 180,
-  },
-  neutralButtonLabel: {
-    color: "#ffffff",
-    fontWeight: "600",
-  },
 });
 
 export default GameSelectionScreen;
diff --git a/src/components/screens/LoginScreen.js b/src/components/screens/LoginScreen.js
index c37c0e3..9c001bc 100644
--- a/src/components/screens/LoginScreen.js
+++ b/src/components/screens/LoginScreen.js
@@ -15,11 +15,12 @@ const LoginScreen = ({ navigation }) => {
     if (!user) {
       return;
     }
+    const rootNav = navigation.getParent() || navigation;
     if (user.IsAcceptedAdmin) {
-      navigation.reset({ index: 0, routes: [{ name: 'Admin' }] });
+      rootNav.reset({ index: 0, routes: [{ name: 'Admin' }] });
       return;
     }
-    navigation.reset({ index: 0, routes: [{ name: 'Game' }] });
+    rootNav.reset({ index: 0, routes: [{ name: 'Game' }] });
   };
 
   return (
@@ -58,7 +59,7 @@ const LoginScreen = ({ navigation }) => {
           />
         </ButtonTray>
 
-        <Pressable onPress={() => navigation.navigate('Auth', { screen: 'RegisterScreen' })}>
+        <Pressable onPress={() => navigation.navigate('RegisterScreen')}>
           <Text style={styles.linkText}>Create new account</Text>
         </Pressable>
       </View>
diff --git a/src/components/screens/MapScreen.js b/src/components/screens/MapScreen.js
index f192187..df74617 100644
--- a/src/components/screens/MapScreen.js
+++ b/src/components/screens/MapScreen.js
@@ -5,14 +5,25 @@ import * as Location from 'expo-location';
 import {useFocusEffect} from '@react-navigation/native';
 import Screen from '../layout/Screen';
 import {Button, ButtonTray} from '../UI/Button';
+import CodeJoinRow from '../UI/CodeJoinRow';
 import PendingApprovalView from '../UI/PendingApprovalView';
 import CacheCardItem from '../gameplay/CacheCardItem';
 import ClaimTimerView from '../gameplay/ClaimTimerView';
 import PlayerMapView from '../gameplay/PlayerMapView';
+import Card from '../UI/Card';
 import useGameHook from '../../hooks/useGameHook';
 import usePlayerGame from '../../hooks/usePlayerGame';
-import {getSession, setPendingAdmin, setSelectedCache, setSessionGroup, setSessionTeam, setSessionUser} from '../../hooks/SessionStore';
+import {
+    getSession,
+    setPendingAdmin,
+    setSelectedCache,
+    setSessionGroup,
+    setSessionMode,
+    setSessionTeam,
+    setSessionUser
+} from '../../hooks/SessionStore';
 import {getFovCone} from '../../utils/geoMath';
+import {GAME_MODE} from '../../utils/gameConstants';
 
 const DEFAULT_REGION = {latitude: 51.5074, longitude: -0.1278, latitudeDelta: 0.05, longitudeDelta: 0.05};
 
@@ -20,11 +31,17 @@ const DEFAULT_REGION = {latitude: 51.5074, longitude: -0.1278, latitudeDelta: 0.
 const MapScreen = ({navigation, route}) => {
   const session = getSession();
   const isBusiness = Boolean(session.isBusiness);
-  const {getCaches, claimCache, upsertCache, deleteCache, joinPrivateGame, joinTeamByCode, createPrivateGame, getLobby, getUser, getSubgroups, getGroupByOrgCode} = useGameHook();
+  const {getCaches, claimCache, upsertCache, deleteCache, joinPrivateGame, joinTeamByCode, createPrivateGame, getGroups, getLobby, getUser, getSubgroups, getGroupByOrgCode} = useGameHook();
 
   // Stable ref to prevent infinite re-render loops
   const getCachesRef = useRef(getCaches);
   getCachesRef.current = getCaches;
+  const getLobbyRef = useRef(getLobby);
+  getLobbyRef.current = getLobby;
+  const getSubgroupsRef = useRef(getSubgroups);
+  getSubgroupsRef.current = getSubgroups;
+  const getGroupsRef = useRef(getGroups);
+  getGroupsRef.current = getGroups;
   const lastAppliedRouteDepartmentRef = useRef(null);
 
   const [inGame, setInGame] = useState(Boolean(session.currentGid));
@@ -39,6 +56,8 @@ const MapScreen = ({navigation, route}) => {
   const [selectedCacheId, setSelectedCacheIdState] = useState(session.selectedCacheId);
   const [claimedPopupVisible, setClaimedPopupVisible] = useState(false);
   const [subgroups, setSubgroups] = useState([]);
+  const [availableGames, setAvailableGames] = useState([]);
+  const [gamesLoading, setGamesLoading] = useState(false);
 
   // Business join flow state
   const [joinStep, setJoinStep] = useState(null);
@@ -87,9 +106,26 @@ const MapScreen = ({navigation, route}) => {
 
   useEffect(() => {
     if (!session.currentGid) return;
-    getLobby(session.currentGid).then(setGroupInfo);
-    getSubgroups(session.currentGid).then(setSubgroups);
-  }, [inGame]);
+    getLobbyRef.current(session.currentGid).then(setGroupInfo);
+    getSubgroupsRef.current(session.currentGid).then(setSubgroups);
+  }, [inGame, session.currentGid]);
+
+  useEffect(() => {
+    const loadAvailableGames = async () => {
+      if (inGame || session.isBusiness) {
+        setAvailableGames([]);
+        return;
+      }
+
+      setGamesLoading(true);
+      const groups = await getGroupsRef.current();
+      const individualGames = (groups || []).filter((group) => !group.BusinessOrSchoolName);
+      setAvailableGames(individualGames);
+      setGamesLoading(false);
+    };
+
+    loadAvailableGames();
+  }, [inGame, session.isBusiness]);
 
   // Default member subgroup SGid for cache creation (first non-admin subgroup)
   const departments = useMemo(
@@ -153,7 +189,7 @@ const MapScreen = ({navigation, route}) => {
         const firstId = activeCachesForPlayer[0].id;
         setSelectedCacheIdState(firstId);
         setSelectedCache(firstId);
-    }, [activeCachesForPlayer, isPlayer]);
+    }, [activeCachesForPlayer, isPlayer, selectedCacheId]);
 
     // Location tracking
     useEffect(() => {
@@ -198,9 +234,12 @@ const MapScreen = ({navigation, route}) => {
 
     const handleJoinGame = async () => {
         if (!gameCode.trim()) return;
-        const result = await joinPrivateGame({JoinCode: gameCode.trim().toUpperCase(), Uid: session.currentUid});
+        const code = gameCode.trim().toUpperCase();
+
+        const result = await joinPrivateGame({JoinCode: code, Uid: session.currentUid});
         if (!result) return;
         setSessionGroup(result.Gid, result.SGid);
+        setSessionMode(GAME_MODE.REGULAR);
         setPendingAdmin(false);
 
         const freshUser = await getUser(session.currentUid);
@@ -214,6 +253,11 @@ const MapScreen = ({navigation, route}) => {
         navigation.navigate('TeamScreen');
     };
 
+    const handleEnterGlobal = () => {
+        setSessionMode(GAME_MODE.GLOBAL);
+        navigation.navigate('GlobalEventsScreen');
+    };
+
     const handleCreateGame = async () => {
         const result = await createPrivateGame({
             GroupName: 'My Game',
@@ -222,6 +266,7 @@ const MapScreen = ({navigation, route}) => {
             MaxMemberSubgroups: 1,
         });
         if (!result) return;
+        setSessionMode(GAME_MODE.REGULAR);
         setPendingAdmin(false);
         const freshUser = await getUser(session.currentUid);
         if (freshUser) {
@@ -243,6 +288,7 @@ const MapScreen = ({navigation, route}) => {
             isBusiness: true,
         });
         if (!result) return;
+        setSessionMode(GAME_MODE.REGULAR);
         setPendingAdmin(false);
         const freshUser = await getUser(session.currentUid);
         if (freshUser) {
@@ -305,6 +351,7 @@ const MapScreen = ({navigation, route}) => {
             return;
         }
         setSessionGroup(result.Gid, result.SGid);
+        setSessionMode(GAME_MODE.REGULAR);
         setPendingAdmin(false);
         const freshUser = await getUser(session.currentUid);
         if (freshUser) {
@@ -332,7 +379,7 @@ const MapScreen = ({navigation, route}) => {
             setTimeout(() => setClaimedPopupVisible(false), 3000);
         }
         await loadCaches();
-    }, [session.currentGid, session.currentUid, session.currentTid, effectiveSGid, loadCaches]);
+    }, [session.currentGid, session.currentUid, session.currentTid, effectiveSGid, claimCache, setIsClaiming, loadCaches]);
 
     const handleCreateCachePress = () => {
         const fallback = userLocation || {latitude: mapRegion.latitude, longitude: mapRegion.longitude};
@@ -421,22 +468,12 @@ const MapScreen = ({navigation, route}) => {
                 <Screen style={styles.center}>
                     <Text style={styles.bizTitle}>Join {matchedGroup.BusinessOrSchoolName || 'Company'}</Text>
                     <Text style={styles.bizSubtitle}>Enter your department code to join</Text>
-                    <View style={styles.inputRow}>
-                        <TextInput
-                            style={styles.codeInput}
-                            placeholder="Department Code"
-                            placeholderTextColor="#9ca3af"
-                            value={deptCode}
-                            onChangeText={(text) => setDeptCode(text.toUpperCase())}
-                            autoCapitalize="characters"
-                        />
-                        <Button
-                            label="Join"
-                            onClick={handleJoinDepartment}
-                            styleButton={styles.joinButton}
-                            styleLabel={styles.joinLabel}
-                        />
-                    </View>
+                    <CodeJoinRow
+                        value={deptCode}
+                        onChange={setDeptCode}
+                        placeholder="Department Code"
+                        onSubmit={handleJoinDepartment}
+                    />
                     {joinError ? <Text style={styles.joinError}>{joinError}</Text> : null}
                     <View style={styles.fullRow}>
                         <ButtonTray>
@@ -457,22 +494,13 @@ const MapScreen = ({navigation, route}) => {
             <Screen style={styles.center}>
                 <Text style={styles.bizTitle}>Welcome</Text>
                 <Text style={styles.bizSubtitle}>Set up your organisation or join an existing one</Text>
-                <View style={styles.inputRow}>
-                    <TextInput
-                        style={styles.codeInput}
-                            placeholder="Company Code"
-                        placeholderTextColor="#9ca3af"
-                        value={orgCode}
-                        onChangeText={(text) => setOrgCode(text.toUpperCase())}
-                        autoCapitalize="characters"
-                    />
-                    <Button
-                        label="Join Company"
-                        onClick={handleVerifyOrgCode}
-                        styleButton={styles.joinButton}
-                        styleLabel={styles.joinLabel}
-                    />
-                </View>
+                <CodeJoinRow
+                    value={orgCode}
+                    onChange={setOrgCode}
+                    placeholder="Company Code"
+                    buttonLabel="Join Company"
+                    onSubmit={handleVerifyOrgCode}
+                />
                 {joinError ? <Text style={styles.joinError}>{joinError}</Text> : null}
                 <View style={styles.fullRow}>
                     <ButtonTray>
@@ -492,23 +520,23 @@ const MapScreen = ({navigation, route}) => {
     if (!inGame) {
         return (
             <Screen style={styles.center}>
-                <View style={styles.inputRow}>
-                    <TextInput
-                        style={styles.codeInput}
-                        placeholder="Enter Game Code"
-                        placeholderTextColor="#9ca3af"
-                        value={gameCode}
-                        onChangeText={(text) => setGameCode(text.toUpperCase())}
-                        autoCapitalize="characters"
-                    />
-                    <Button
-                        label="Join"
-                        onClick={handleJoinGame}
-                        styleButton={styles.joinButton}
-                        styleLabel={styles.joinLabel}
-                    />
+                <View style={[styles.fullRow, styles.globalButtonRow]}>
+                    <ButtonTray>
+                        <Button
+                            label="Join Global Game"
+                            onClick={handleEnterGlobal}
+                            styleButton={styles.globalJoinButton}
+                            styleLabel={styles.globalJoinLabel}
+                        />
+                    </ButtonTray>
                 </View>
-                <View style={styles.fullRow}>
+                <CodeJoinRow
+                    value={gameCode}
+                    onChange={setGameCode}
+                    placeholder="Enter Game Code"
+                    onSubmit={handleJoinGame}
+                />
+                <View style={[styles.fullRow, styles.createGameRow]}>
                     <ButtonTray>
                         <Button
                             label="Create a Game"
@@ -518,6 +546,23 @@ const MapScreen = ({navigation, route}) => {
                         />
                     </ButtonTray>
                 </View>
+                <View style={[styles.fullRow, styles.availableGamesRow]}>
+                    <Text style={styles.availableGamesTitle}>Available Individual Games</Text>
+                    {gamesLoading ? (
+                        <Text style={styles.availableGamesBody}>Loading games...</Text>
+                    ) : availableGames.length === 0 ? (
+                        <Text style={styles.availableGamesBody}>No individual games available right now.</Text>
+                    ) : (
+                        <ScrollView style={styles.availableGamesList} contentContainerStyle={styles.availableGamesContent}>
+                            {availableGames.map((group) => (
+                                <Card key={group.Gid} style={styles.availableGameCard}>
+                                    <Text style={styles.availableGameName}>{group.GroupName || `Game ${group.Gid}`}</Text>
+                                    <Text style={styles.availableGameMeta}>Game ID: {group.Gid}</Text>
+                                </Card>
+                            ))}
+                        </ScrollView>
+                    )}
+                </View>
             </Screen>
         );
     }
@@ -794,20 +839,19 @@ const styles = StyleSheet.create({
     mapContainer: {height: 200},
     error: {color: '#D92800', fontSize: 15},
     loadingText: {color: '#6c7086', fontSize: 14, marginTop: 10},
-    inputRow: {flexDirection: 'row', gap: 10, marginBottom: 15, width: '100%', paddingHorizontal: 20},
     fullRow: {width: '100%', paddingHorizontal: 20},
-    codeInput: {
-        flex: 1,
-        borderWidth: 1,
-        borderColor: '#45475a',
-        borderRadius: 8,
-        paddingHorizontal: 12,
-        paddingVertical: 10,
-        fontSize: 16,
-        color: '#cdd6f4',
-        backgroundColor: '#313244',
-    }, joinButton: {backgroundColor: '#bd93f9', borderColor: '#bd93f9', flex: 0, paddingHorizontal: 20},
-    joinLabel: {color: '#1e1e2e', fontWeight: '600'},
+    globalButtonRow: {marginBottom: 12},
+    createGameRow: {marginBottom: 12},
+    availableGamesRow: {paddingTop: 4},
+    globalJoinButton: {backgroundColor: '#bd93f9', borderColor: '#bd93f9'},
+    globalJoinLabel: {color: '#1e1e2e', fontWeight: '600'},
+    availableGamesTitle: {color: '#cdd6f4', fontSize: 16, fontWeight: '700', marginBottom: 8},
+    availableGamesBody: {color: '#bac2de', fontSize: 14, marginBottom: 6},
+    availableGamesList: {maxHeight: 220},
+    availableGamesContent: {paddingBottom: 10},
+    availableGameCard: {marginBottom: 8},
+    availableGameName: {color: '#cdd6f4', fontSize: 15, fontWeight: '700', marginBottom: 3},
+    availableGameMeta: {color: '#bac2de', fontSize: 12},
     createButton: {backgroundColor: '#a6e3a1', borderColor: '#a6e3a1'},
     createLabel: {color: '#1e1e2e', fontWeight: '600'},
     bizTitle: {fontSize: 22, fontWeight: '700', color: '#cdd6f4', marginBottom: 6, textAlign: 'center'},
diff --git a/src/components/screens/RegisterScreen.js b/src/components/screens/RegisterScreen.js
index 613cf1a..e58f0b1 100644
--- a/src/components/screens/RegisterScreen.js
+++ b/src/components/screens/RegisterScreen.js
@@ -19,11 +19,12 @@ const RegisterScreen = ({navigation}) => {
     const user = await register();
     setSubmitting(false);
     if (!user) return;
+    const rootNav = navigation.getParent() || navigation;
     if (user.IsAcceptedAdmin) {
-      navigation.reset({index: 0, routes: [{name: 'Admin'}]});
+      rootNav.reset({index: 0, routes: [{name: 'Admin'}]});
       return;
     }
-    navigation.reset({index: 0, routes: [{name: 'Game'}]});
+    rootNav.reset({index: 0, routes: [{name: 'Game'}]});
   };
 
   return (
@@ -100,7 +101,7 @@ const RegisterScreen = ({navigation}) => {
           />
         </ButtonTray>
 
-        <Pressable onPress={() => navigation.navigate('Auth', {screen: 'LoginScreen'})}>
+        <Pressable onPress={() => navigation.navigate('LoginScreen')}>
           <Text style={styles.linkText}>Back to Login</Text>
         </Pressable>
       </View>
diff --git a/src/components/screens/global/GlobalCacheViewScreen.js b/src/components/screens/global/GlobalCacheViewScreen.js
index 1e76668..327d607 100644
--- a/src/components/screens/global/GlobalCacheViewScreen.js
+++ b/src/components/screens/global/GlobalCacheViewScreen.js
@@ -1,10 +1,11 @@
-import { useEffect, useState } from "react";
-import { ActivityIndicator, Alert, StyleSheet, Text, View } from "react-native";
+import {useEffect, useState} from "react";
+import {ActivityIndicator, Alert, StyleSheet, Text, View} from "react-native";
 import Screen from "../../layout/Screen";
-import { Button, ButtonTray } from "../../UI/Button";
+import {Button, ButtonTray} from "../../UI/Button";
 import Card from "../../UI/Card";
 import useGlobalHook from "../../../hooks/useGlobalHook";
-import { getSession } from "../../../hooks/SessionStore";
+import {getSession} from "../../../hooks/SessionStore";
+import {GAME_MODE} from "../../../utils/gameConstants";
 
 const GlobalCacheViewScreen = ({ navigation, route }) => {
   // Initialisations ---------------------
@@ -60,6 +61,12 @@ const GlobalCacheViewScreen = ({ navigation, route }) => {
     );
   };
 
+  useEffect(() => {
+    if (session.isBusiness || session.currentGameMode !== GAME_MODE.GLOBAL) {
+      navigation.replace("MapScreen");
+    }
+  }, [navigation, session.currentGameMode, session.isBusiness]);
+
   // View --------------------------------
 
   return (
diff --git a/src/components/screens/global/GlobalEventsScreen.js b/src/components/screens/global/GlobalEventsScreen.js
index aabacf4..8d5d5dd 100644
--- a/src/components/screens/global/GlobalEventsScreen.js
+++ b/src/components/screens/global/GlobalEventsScreen.js
@@ -1,16 +1,27 @@
-import { useCallback, useEffect, useState } from "react";
-import { ActivityIndicator, StyleSheet, Text, View } from "react-native";
+import {useCallback, useEffect, useRef, useState} from "react";
+import {ActivityIndicator, StyleSheet, Text, View} from "react-native";
 import Screen from "../../layout/Screen";
-import { Button, ButtonTray } from "../../UI/Button";
+import {Button, ButtonTray} from "../../UI/Button";
 import EventList from "../../../entity/event/EventList";
 import useGlobalHook from "../../../hooks/useGlobalHook";
-import { getSession, setGlobalSession } from "../../../hooks/SessionStore";
+import {getSession, setGlobalSession} from "../../../hooks/SessionStore";
+import {GAME_MODE} from "../../../utils/gameConstants";
 
 const GlobalEventsScreen = ({ navigation }) => {
   // Initialisations ---------------------
 
   const { getPublicEvents, getPlayersByEvent, joinEvent } = useGlobalHook();
   const session = getSession();
+  const globalApiRef = useRef({
+    getPublicEvents,
+    getPlayersByEvent,
+    joinEvent,
+  });
+  globalApiRef.current = {
+    getPublicEvents,
+    getPlayersByEvent,
+    joinEvent,
+  };
 
   // State -------------------------------
 
@@ -24,21 +35,25 @@ const GlobalEventsScreen = ({ navigation }) => {
   const loadEvents = useCallback(async () => {
     setIsLoading(true);
     setError("");
-    const data = await getPublicEvents();
+    const data = await globalApiRef.current.getPublicEvents();
     setEvents(data);
     setIsLoading(false);
   }, []);
 
   useEffect(() => {
+    if (session.isBusiness || session.currentGameMode !== GAME_MODE.GLOBAL) {
+      navigation.replace("MapScreen");
+      return;
+    }
     loadEvents();
-  }, [loadEvents]);
+  }, [loadEvents, navigation, session.currentGameMode, session.isBusiness]);
 
   const handleSelect = async (event) => {
     setError("");
     setJoining(event.EventID);
 
     // Check if already a player
-    const players = await getPlayersByEvent(event.EventID);
+    const players = await globalApiRef.current.getPlayersByEvent(event.EventID);
     const existing = (players || []).find(
       (p) => p.PlayerUserID === session.currentUid,
     );
@@ -48,7 +63,7 @@ const GlobalEventsScreen = ({ navigation }) => {
       navigation.navigate("GlobalMapScreen", { eventId: event.EventID });
     } else {
       // Join the event
-      const player = await joinEvent({
+      const player = await globalApiRef.current.joinEvent({
         PlayerUserID: session.currentUid,
         PlayerEventID: event.EventID,
       });
diff --git a/src/components/screens/global/GlobalLeaderboardScreen.js b/src/components/screens/global/GlobalLeaderboardScreen.js
index cb4867b..30dffb8 100644
--- a/src/components/screens/global/GlobalLeaderboardScreen.js
+++ b/src/components/screens/global/GlobalLeaderboardScreen.js
@@ -1,22 +1,17 @@
-import { useCallback, useEffect, useState } from "react";
-import {
-  ActivityIndicator,
-  ScrollView,
-  StyleSheet,
-  Text,
-  View,
-} from "react-native";
+import {useCallback, useEffect, useState} from "react";
+import {ActivityIndicator, ScrollView, StyleSheet, Text, View,} from "react-native";
 import Screen from "../../layout/Screen";
-import { Button, ButtonTray } from "../../UI/Button";
+import {Button, ButtonTray} from "../../UI/Button";
 import Card from "../../UI/Card";
 import FindList from "../../../entity/find/FindList";
 import useGlobalHook from "../../../hooks/useGlobalHook";
-import { getSession } from "../../../hooks/SessionStore";
+import {getSession} from "../../../hooks/SessionStore";
+import {GAME_MODE} from "../../../utils/gameConstants";
 
 const GlobalLeaderboardScreen = ({ navigation, route }) => {
   // Initialisations ---------------------
 
-  const { eventId } = route.params;
+  const eventId = route?.params?.eventId ?? getSession().currentGlobalEventId;
   const { getFindsByEvent, getCachesByEvent, getPlayersByEvent } =
     useGlobalHook();
   const session = getSession();
@@ -79,11 +74,19 @@ const GlobalLeaderboardScreen = ({ navigation, route }) => {
     const ranked = Object.values(pointsMap).sort((a, b) => b.points - a.points);
     setRankings(ranked);
     setIsLoading(false);
-  }, [eventId]);
+  }, [eventId, getFindsByEvent, getCachesByEvent, getPlayersByEvent]);
 
   useEffect(() => {
+    if (session.isBusiness || session.currentGameMode !== GAME_MODE.GLOBAL) {
+      navigation.replace("MapScreen");
+      return;
+    }
+    if (!eventId) {
+      navigation.replace("GlobalEventsScreen");
+      return;
+    }
     loadData();
-  }, [loadData]);
+  }, [eventId, loadData, navigation, session.currentGameMode, session.isBusiness]);
 
   // View --------------------------------
 
diff --git a/src/components/screens/global/GlobalMapScreen.js b/src/components/screens/global/GlobalMapScreen.js
index 566300c..c567691 100644
--- a/src/components/screens/global/GlobalMapScreen.js
+++ b/src/components/screens/global/GlobalMapScreen.js
@@ -1,12 +1,13 @@
-import { useCallback, useEffect, useState } from "react";
-import { ActivityIndicator, StyleSheet, Text, View } from "react-native";
-import MapView, { Marker } from "react-native-maps";
+import {useCallback, useEffect, useState} from "react";
+import {ActivityIndicator, StyleSheet, Text, View} from "react-native";
+import MapView, {Marker} from "react-native-maps";
 import * as Location from "expo-location";
 import Screen from "../../layout/Screen";
-import { Button, ButtonTray } from "../../UI/Button";
+import {Button, ButtonTray} from "../../UI/Button";
 import CacheList from "../../../entity/cache/CacheList";
 import useGlobalHook from "../../../hooks/useGlobalHook";
-import { getSession } from "../../../hooks/SessionStore";
+import {getSession} from "../../../hooks/SessionStore";
+import {GAME_MODE} from "../../../utils/gameConstants";
 
 const DEFAULT_REGION = {
   latitude: 51.5074,
@@ -18,7 +19,7 @@ const DEFAULT_REGION = {
 const GlobalMapScreen = ({ navigation, route }) => {
   // Initialisations ---------------------
 
-  const { eventId } = route.params;
+  const eventId = route?.params?.eventId ?? getSession().currentGlobalEventId;
   const { getCachesByEvent, getFindsByPlayer } = useGlobalHook();
   const session = getSession();
 
@@ -47,11 +48,19 @@ const GlobalMapScreen = ({ navigation, route }) => {
     setCaches(cacheData);
     setFoundCacheIds((findsData || []).map((f) => f.FindCacheID));
     setIsLoading(false);
-  }, [eventId]);
+  }, [eventId, getCachesByEvent, getFindsByPlayer, session.currentGlobalPlayerId]);
 
   useEffect(() => {
+    if (session.isBusiness || session.currentGameMode !== GAME_MODE.GLOBAL) {
+      navigation.replace("MapScreen");
+      return;
+    }
+    if (!eventId) {
+      navigation.replace("GlobalEventsScreen");
+      return;
+    }
     loadData();
-  }, [loadData]);
+  }, [eventId, loadData, navigation, session.currentGameMode, session.isBusiness]);
 
   useEffect(() => {
     let sub;
diff --git a/src/hooks/SessionStore.js b/src/hooks/SessionStore.js
index 47ded78..8e7af57 100644
--- a/src/hooks/SessionStore.js
+++ b/src/hooks/SessionStore.js
@@ -1,6 +1,5 @@
-// --- Session Store (with AsyncStorage persistence) ---
-
 import AsyncStorage from "@react-native-async-storage/async-storage";
+import {GAME_MODE} from '../utils/gameConstants';
 
 const STORAGE_KEY = "@mad_session";
 
@@ -13,6 +12,7 @@ const session = {
   isAcceptedAdmin: false,
   isPendingAdmin: false,
   teamsEnabled: false,
+  currentGameMode: null,
   // Global gameplay
   currentGlobalEventId: null,
   currentGlobalPlayerId: null,
@@ -31,11 +31,16 @@ const setSessionUser = (user) => {
   session.isPendingAdmin = Boolean(
     user?.isBusiness && user?.Gid && !user?.SGid && !user?.IsAcceptedAdmin,
   );
+  // New login/register starts in regular flow; global flow requires entering GLOBAL code.
+  session.currentGlobalEventId = null;
+  session.currentGlobalPlayerId = null;
+  session.currentGameMode = user?.Gid ? GAME_MODE.REGULAR : null;
   persistSession();
 };
 
 const setSessionGroup = (gid, sgid = null) => {
   session.currentGid = gid ?? null;
+  session.currentGameMode = gid ? GAME_MODE.REGULAR : session.currentGameMode;
   if (sgid !== undefined) {
     session.currentSGid = sgid ?? null;
   }
@@ -67,12 +72,19 @@ const getSession = () => ({ ...session });
 const setGlobalSession = (eventId, playerId) => {
   session.currentGlobalEventId = eventId ?? null;
   session.currentGlobalPlayerId = playerId ?? null;
+  session.currentGameMode = eventId ? GAME_MODE.GLOBAL : session.currentGameMode;
+  persistSession();
+};
+
+const setSessionMode = (mode) => {
+  session.currentGameMode = mode ?? null;
   persistSession();
 };
 
 const clearGlobalSession = () => {
   session.currentGlobalEventId = null;
   session.currentGlobalPlayerId = null;
+  if (!session.currentGid) session.currentGameMode = null;
   persistSession();
 };
 
@@ -83,6 +95,7 @@ const clearSession = () => {
   session.currentTid = null;
   session.isBusiness = null;
   session.isAcceptedAdmin = false;
+  session.currentGameMode = null;
   session.currentGlobalEventId = null;
   session.currentGlobalPlayerId = null;
   session.isPendingAdmin = false;
@@ -98,6 +111,7 @@ const clearGameSession = () => {
   session.isPendingAdmin = false;
   session.teamsEnabled = false;
   session.selectedCacheId = null;
+  if (!session.currentGlobalEventId) session.currentGameMode = null;
   persistSession();
 };
 
@@ -125,11 +139,13 @@ export {
   setSessionGroup,
   setSessionTeam,
   setSessionTeamsEnabled,
+  setPendingAdmin,
+  setSelectedCache,
   getSession,
   clearSession,
   clearGameSession,
   loadSession,
   setGlobalSession,
   clearGlobalSession,
+  setSessionMode,
 };
-export { setSessionUser, setSessionGroup, setSessionTeam, setSessionTeamsEnabled, setPendingAdmin, setSelectedCache, getSession, clearSession, clearGameSession, loadSession };
diff --git a/src/hooks/useGameHook.js b/src/hooks/useGameHook.js
index 4385a71..4766bc7 100644
--- a/src/hooks/useGameHook.js
+++ b/src/hooks/useGameHook.js
@@ -31,6 +31,11 @@ const useGameHook = () => {
     return response.isSuccess ? response.result : null;
   };
 
+  const getGroups = async () => {
+    const response = await API.get(groupsEndpoint);
+    return response.isSuccess ? response.result : [];
+  };
+
   const getLobby = async (gid) => {
     const response = await API.get(`${groupsEndpoint}/${gid}`);
     return response.isSuccess ? response.result : null;
@@ -250,6 +255,7 @@ const useGameHook = () => {
     getUser,
     updateUser,
     createPrivateGame,
+    getGroups,
     getLobby,
     updateGroup,
     getGroupByOrgCode,
diff --git a/src/utils/gameConstants.js b/src/utils/gameConstants.js
new file mode 100644
index 0000000..fc082a9
--- /dev/null
+++ b/src/utils/gameConstants.js
@@ -0,0 +1,7 @@
+export const GLOBAL_GAME_CODE = 'GLOBAL';
+
+export const GAME_MODE = {
+  REGULAR: 'regular',
+  GLOBAL: 'global',
+};
+