diff --git a/.gitignore b/.gitignore
index c4fcf5f..9069e79 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,9 @@
 # Learn more https://docs.github.com/en/get-started/getting-started-with-git/ignoring-files
 
+# Environment variables (contains secrets)
+.env
+.env.local
+
 # dependencies
 node_modules/
 
diff --git a/src/components/screens/global/GlobalCacheViewScreen.js b/src/components/screens/global/GlobalCacheViewScreen.js
new file mode 100644
index 0000000..1e76668
--- /dev/null
+++ b/src/components/screens/global/GlobalCacheViewScreen.js
@@ -0,0 +1,177 @@
+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 Card from "../../UI/Card";
+import useGlobalHook from "../../../hooks/useGlobalHook";
+import { getSession } from "../../../hooks/SessionStore";
+
+const GlobalCacheViewScreen = ({ navigation, route }) => {
+  // Initialisations ---------------------
+
+  const { cache, isFound: initIsFound, onFindLogged } = route.params;
+  const { logFind } = useGlobalHook();
+  const session = getSession();
+
+  // State -------------------------------
+
+  const [isFound, setIsFound] = useState(initIsFound);
+  const [isLogging, setIsLogging] = useState(false);
+
+  // Handlers ----------------------------
+
+  const handleLogFind = async () => {
+    if (!session.currentGlobalPlayerId) {
+      Alert.alert(
+        "Not joined",
+        "You must join the event before logging a find.",
+      );
+      return;
+    }
+
+    Alert.alert(
+      "Log Discovery",
+      `Record that you found "${cache.CacheName}" and earn ${cache.CachePoints ?? 0} points?`,
+      [
+        { text: "Cancel", style: "cancel" },
+        {
+          text: "Log Find",
+          onPress: async () => {
+            setIsLogging(true);
+            const result = await logFind({
+              FindPlayerID: session.currentGlobalPlayerId,
+              FindCacheID: cache.CacheID,
+              FindDatetime: new Date().toISOString(),
+            });
+            setIsLogging(false);
+            if (result) {
+              setIsFound(true);
+              if (onFindLogged) onFindLogged();
+              Alert.alert(
+                "Discovery logged!",
+                `+${cache.CachePoints ?? 0} points earned.`,
+              );
+            } else {
+              Alert.alert("Error", "Could not log find. Please try again.");
+            }
+          },
+        },
+      ],
+    );
+  };
+
+  // View --------------------------------
+
+  return (
+    <Screen showBack>
+      <View style={styles.container}>
+        <Card style={styles.card}>
+          <Text style={styles.title}>{cache.CacheName}</Text>
+
+          <View
+            style={[
+              styles.statusBadge,
+              isFound ? styles.badgeFound : styles.badgeOpen,
+            ]}
+          >
+            <Text style={styles.statusText}>
+              {isFound ? "Already Found" : "Not Yet Found"}
+            </Text>
+          </View>
+
+          <View style={styles.detailRow}>
+            <Text style={styles.label}>Points</Text>
+            <Text style={styles.value}>{cache.CachePoints ?? 0}</Text>
+          </View>
+
+          {cache.CacheDescription ? (
+            <View style={styles.detailRow}>
+              <Text style={styles.label}>Description</Text>
+              <Text style={styles.value}>{cache.CacheDescription}</Text>
+            </View>
+          ) : null}
+
+          {cache.CacheClue ? (
+            <View style={styles.detailRow}>
+              <Text style={styles.label}>Clue</Text>
+              <Text style={styles.value}>{cache.CacheClue}</Text>
+            </View>
+          ) : null}
+        </Card>
+
+        {isLogging ? (
+          <ActivityIndicator size="large" />
+        ) : (
+          <ButtonTray>
+            {!isFound && (
+              <Button
+                label="Log Discovery"
+                onClick={handleLogFind}
+                styleButton={styles.logButton}
+                styleLabel={styles.logButtonLabel}
+              />
+            )}
+            <Button label="Back" onClick={() => navigation.goBack()} />
+          </ButtonTray>
+        )}
+      </View>
+    </Screen>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    gap: 16,
+  },
+  card: {
+    gap: 12,
+  },
+  title: {
+    fontSize: 22,
+    fontWeight: "700",
+    color: "#111827",
+  },
+  statusBadge: {
+    alignSelf: "flex-start",
+    paddingHorizontal: 10,
+    paddingVertical: 4,
+    borderRadius: 12,
+  },
+  badgeFound: {
+    backgroundColor: "#d1fae5",
+  },
+  badgeOpen: {
+    backgroundColor: "#fef3c7",
+  },
+  statusText: {
+    fontSize: 13,
+    fontWeight: "600",
+    color: "#374151",
+  },
+  detailRow: {
+    gap: 2,
+  },
+  label: {
+    fontSize: 12,
+    fontWeight: "600",
+    color: "#6b7280",
+    textTransform: "uppercase",
+    letterSpacing: 0.5,
+  },
+  value: {
+    fontSize: 15,
+    color: "#111827",
+  },
+  logButton: {
+    backgroundColor: "#16a34a",
+    borderColor: "#16a34a",
+    flex: 2,
+  },
+  logButtonLabel: {
+    color: "#fff",
+    fontWeight: "700",
+  },
+});
+
+export default GlobalCacheViewScreen;
diff --git a/src/components/screens/global/GlobalEventsScreen.js b/src/components/screens/global/GlobalEventsScreen.js
new file mode 100644
index 0000000..aabacf4
--- /dev/null
+++ b/src/components/screens/global/GlobalEventsScreen.js
@@ -0,0 +1,140 @@
+import { useCallback, useEffect, useState } from "react";
+import { ActivityIndicator, StyleSheet, Text, View } from "react-native";
+import Screen from "../../layout/Screen";
+import { Button, ButtonTray } from "../../UI/Button";
+import EventList from "../../../entity/event/EventList";
+import useGlobalHook from "../../../hooks/useGlobalHook";
+import { getSession, setGlobalSession } from "../../../hooks/SessionStore";
+
+const GlobalEventsScreen = ({ navigation }) => {
+  // Initialisations ---------------------
+
+  const { getPublicEvents, getPlayersByEvent, joinEvent } = useGlobalHook();
+  const session = getSession();
+
+  // State -------------------------------
+
+  const [events, setEvents] = useState([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const [error, setError] = useState("");
+  const [joining, setJoining] = useState(null);
+
+  // Handlers ----------------------------
+
+  const loadEvents = useCallback(async () => {
+    setIsLoading(true);
+    setError("");
+    const data = await getPublicEvents();
+    setEvents(data);
+    setIsLoading(false);
+  }, []);
+
+  useEffect(() => {
+    loadEvents();
+  }, [loadEvents]);
+
+  const handleSelect = async (event) => {
+    setError("");
+    setJoining(event.EventID);
+
+    // Check if already a player
+    const players = await getPlayersByEvent(event.EventID);
+    const existing = (players || []).find(
+      (p) => p.PlayerUserID === session.currentUid,
+    );
+
+    if (existing) {
+      setGlobalSession(event.EventID, existing.PlayerID);
+      navigation.navigate("GlobalMapScreen", { eventId: event.EventID });
+    } else {
+      // Join the event
+      const player = await joinEvent({
+        PlayerUserID: session.currentUid,
+        PlayerEventID: event.EventID,
+      });
+      if (player) {
+        setGlobalSession(event.EventID, player.PlayerID);
+        navigation.navigate("GlobalMapScreen", { eventId: event.EventID });
+      } else {
+        setError("Failed to join event. Please try again.");
+      }
+    }
+
+    setJoining(null);
+  };
+
+  // View --------------------------------
+
+  return (
+    <Screen>
+      <View style={styles.container}>
+        <ButtonTray>
+          <Button label="Refresh" onClick={loadEvents} />
+        </ButtonTray>
+
+        {error ? <Text style={styles.error}>{error}</Text> : null}
+
+        {isLoading ? (
+          <View style={styles.center}>
+            <ActivityIndicator size="large" />
+            <Text style={styles.loadingText}>Loading public events…</Text>
+          </View>
+        ) : events.length === 0 ? (
+          <Text style={styles.empty}>No public events available.</Text>
+        ) : (
+          <>
+            <Text style={styles.hint}>
+              Tap an event to join and explore its caches.
+            </Text>
+            <EventList events={events} onSelect={handleSelect} />
+          </>
+        )}
+
+        {joining !== null && (
+          <View style={styles.overlay}>
+            <ActivityIndicator size="large" color="#fff" />
+          </View>
+        )}
+      </View>
+    </Screen>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    gap: 12,
+  },
+  center: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    gap: 10,
+  },
+  loadingText: {
+    color: "#6b7280",
+    fontSize: 14,
+  },
+  empty: {
+    textAlign: "center",
+    color: "#9ca3af",
+    marginTop: 30,
+    fontSize: 15,
+  },
+  hint: {
+    fontSize: 13,
+    color: "#6b7280",
+  },
+  error: {
+    color: "#dc2626",
+    fontSize: 14,
+  },
+  overlay: {
+    ...StyleSheet.absoluteFillObject,
+    backgroundColor: "rgba(0,0,0,0.35)",
+    alignItems: "center",
+    justifyContent: "center",
+  },
+});
+
+export default GlobalEventsScreen;
diff --git a/src/components/screens/global/GlobalLeaderboardScreen.js b/src/components/screens/global/GlobalLeaderboardScreen.js
new file mode 100644
index 0000000..cb4867b
--- /dev/null
+++ b/src/components/screens/global/GlobalLeaderboardScreen.js
@@ -0,0 +1,249 @@
+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 Card from "../../UI/Card";
+import FindList from "../../../entity/find/FindList";
+import useGlobalHook from "../../../hooks/useGlobalHook";
+import { getSession } from "../../../hooks/SessionStore";
+
+const GlobalLeaderboardScreen = ({ navigation, route }) => {
+  // Initialisations ---------------------
+
+  const { eventId } = route.params;
+  const { getFindsByEvent, getCachesByEvent, getPlayersByEvent } =
+    useGlobalHook();
+  const session = getSession();
+
+  // State -------------------------------
+
+  const [isLoading, setIsLoading] = useState(true);
+  const [rankings, setRankings] = useState([]);
+  const [recentFinds, setRecentFinds] = useState([]);
+  const [activeTab, setActiveTab] = useState("rankings");
+
+  // Handlers ----------------------------
+
+  const loadData = useCallback(async () => {
+    setIsLoading(true);
+
+    const [finds, caches, players] = await Promise.all([
+      getFindsByEvent(eventId),
+      getCachesByEvent(eventId),
+      getPlayersByEvent(eventId),
+    ]);
+
+    // Build cache points lookup
+    const cacheMap = {};
+    (caches || []).forEach((c) => {
+      cacheMap[c.CacheID] = c;
+    });
+
+    // Augment finds with cache info for FindList
+    const augmented = (finds || []).map((f) => ({
+      ...f,
+      FindCache: f.FindCache || cacheMap[f.FindCacheID] || null,
+    }));
+
+    // Sort recent first
+    const sorted = [...augmented].sort(
+      (a, b) => new Date(b.FindDatetime) - new Date(a.FindDatetime),
+    );
+    setRecentFinds(sorted.slice(0, 50));
+
+    // Aggregate points per player
+    const pointsMap = {};
+    augmented.forEach((f) => {
+      const pid = f.FindPlayerID;
+      const pts = f.FindCache?.CachePoints ?? 0;
+      if (!pointsMap[pid])
+        pointsMap[pid] = { playerId: pid, points: 0, finds: 0, name: null };
+      pointsMap[pid].points += pts;
+      pointsMap[pid].finds += 1;
+    });
+
+    // Attach usernames from players list
+    (players || []).forEach((p) => {
+      if (pointsMap[p.PlayerID]) {
+        pointsMap[p.PlayerID].name =
+          p.PlayerUser?.UserUsername || `Player #${p.PlayerUserID}`;
+      }
+    });
+
+    const ranked = Object.values(pointsMap).sort((a, b) => b.points - a.points);
+    setRankings(ranked);
+    setIsLoading(false);
+  }, [eventId]);
+
+  useEffect(() => {
+    loadData();
+  }, [loadData]);
+
+  // View --------------------------------
+
+  if (isLoading) {
+    return (
+      <Screen style={styles.center}>
+        <ActivityIndicator size="large" />
+      </Screen>
+    );
+  }
+
+  return (
+    <Screen showBack>
+      <View style={styles.container}>
+        <View style={styles.tabs}>
+          <TabButton
+            label="Rankings"
+            active={activeTab === "rankings"}
+            onPress={() => setActiveTab("rankings")}
+          />
+          <TabButton
+            label="Recent Finds"
+            active={activeTab === "recentFinds"}
+            onPress={() => setActiveTab("recentFinds")}
+          />
+        </View>
+
+        {activeTab === "rankings" ? (
+          <ScrollView contentContainerStyle={styles.rankList}>
+            {rankings.length === 0 ? (
+              <Text style={styles.empty}>No finds recorded yet.</Text>
+            ) : (
+              rankings.map((entry, index) => {
+                const isCurrent =
+                  entry.playerId === session.currentGlobalPlayerId;
+                return (
+                  <Card
+                    key={entry.playerId}
+                    style={[styles.rankCard, isCurrent && styles.myCard]}
+                  >
+                    <View style={styles.rankRow}>
+                      <Text style={styles.rankPos}>#{index + 1}</Text>
+                      <Text style={styles.rankName} numberOfLines={1}>
+                        {entry.name || `Player #${entry.playerId}`}
+                        {isCurrent ? "  (you)" : ""}
+                      </Text>
+                      <View style={styles.rankRight}>
+                        <Text style={styles.rankPoints}>
+                          {entry.points} pts
+                        </Text>
+                        <Text style={styles.rankFinds}>
+                          {entry.finds} finds
+                        </Text>
+                      </View>
+                    </View>
+                  </Card>
+                );
+              })
+            )}
+          </ScrollView>
+        ) : recentFinds.length === 0 ? (
+          <Text style={styles.empty}>No finds recorded yet.</Text>
+        ) : (
+          <FindList finds={recentFinds} />
+        )}
+
+        <ButtonTray>
+          <Button label="Refresh" onClick={loadData} />
+        </ButtonTray>
+      </View>
+    </Screen>
+  );
+};
+
+const TabButton = ({ label, active, onPress }) => (
+  <Text
+    onPress={onPress}
+    style={[tabStyles.tab, active && tabStyles.activeTab]}
+  >
+    {label}
+  </Text>
+);
+
+const tabStyles = StyleSheet.create({
+  tab: {
+    flex: 1,
+    textAlign: "center",
+    paddingVertical: 8,
+    fontSize: 14,
+    fontWeight: "600",
+    color: "#6b7280",
+    borderBottomWidth: 2,
+    borderBottomColor: "transparent",
+  },
+  activeTab: {
+    color: "#111827",
+    borderBottomColor: "#111827",
+  },
+});
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    gap: 10,
+  },
+  center: {
+    alignItems: "center",
+    justifyContent: "center",
+  },
+  tabs: {
+    flexDirection: "row",
+    borderBottomWidth: 1,
+    borderBottomColor: "#e5e7eb",
+  },
+  rankList: {
+    gap: 6,
+    paddingBottom: 8,
+  },
+  rankCard: {
+    marginBottom: 0,
+  },
+  myCard: {
+    borderColor: "#2563eb",
+    borderWidth: 2,
+  },
+  rankRow: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: 10,
+  },
+  rankPos: {
+    fontSize: 16,
+    fontWeight: "700",
+    color: "#6b7280",
+    width: 32,
+  },
+  rankName: {
+    flex: 1,
+    fontSize: 15,
+    fontWeight: "600",
+    color: "#111827",
+  },
+  rankRight: {
+    alignItems: "flex-end",
+  },
+  rankPoints: {
+    fontSize: 16,
+    fontWeight: "700",
+    color: "#16a34a",
+  },
+  rankFinds: {
+    fontSize: 12,
+    color: "#9ca3af",
+  },
+  empty: {
+    textAlign: "center",
+    color: "#9ca3af",
+    marginTop: 30,
+    fontSize: 15,
+  },
+});
+
+export default GlobalLeaderboardScreen;
diff --git a/src/components/screens/global/GlobalMapScreen.js b/src/components/screens/global/GlobalMapScreen.js
new file mode 100644
index 0000000..566300c
--- /dev/null
+++ b/src/components/screens/global/GlobalMapScreen.js
@@ -0,0 +1,230 @@
+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 CacheList from "../../../entity/cache/CacheList";
+import useGlobalHook from "../../../hooks/useGlobalHook";
+import { getSession } from "../../../hooks/SessionStore";
+
+const DEFAULT_REGION = {
+  latitude: 51.5074,
+  longitude: -0.1278,
+  latitudeDelta: 0.05,
+  longitudeDelta: 0.05,
+};
+
+const GlobalMapScreen = ({ navigation, route }) => {
+  // Initialisations ---------------------
+
+  const { eventId } = route.params;
+  const { getCachesByEvent, getFindsByPlayer } = useGlobalHook();
+  const session = getSession();
+
+  // State -------------------------------
+
+  const [caches, setCaches] = useState([]);
+  const [foundCacheIds, setFoundCacheIds] = useState([]);
+  const [userLocation, setUserLocation] = useState(null);
+  const [isLoading, setIsLoading] = useState(true);
+  const [activeTab, setActiveTab] = useState("map");
+  const [error, setError] = useState("");
+
+  // Handlers ----------------------------
+
+  const loadData = useCallback(async () => {
+    setIsLoading(true);
+    setError("");
+
+    const [cacheData, findsData] = await Promise.all([
+      getCachesByEvent(eventId),
+      session.currentGlobalPlayerId
+        ? getFindsByPlayer(session.currentGlobalPlayerId)
+        : Promise.resolve([]),
+    ]);
+
+    setCaches(cacheData);
+    setFoundCacheIds((findsData || []).map((f) => f.FindCacheID));
+    setIsLoading(false);
+  }, [eventId]);
+
+  useEffect(() => {
+    loadData();
+  }, [loadData]);
+
+  useEffect(() => {
+    let sub;
+    const start = async () => {
+      const { status } = await Location.requestForegroundPermissionsAsync();
+      if (status !== "granted") {
+        setError("Location permission denied");
+        return;
+      }
+
+      const last = await Location.getLastKnownPositionAsync();
+      if (last) {
+        setUserLocation({
+          latitude: last.coords.latitude,
+          longitude: last.coords.longitude,
+        });
+      } else {
+        const pos = await Location.getCurrentPositionAsync({
+          accuracy: Location.Accuracy.Low,
+        });
+        setUserLocation({
+          latitude: pos.coords.latitude,
+          longitude: pos.coords.longitude,
+        });
+      }
+
+      sub = await Location.watchPositionAsync(
+        {
+          accuracy: Location.Accuracy.Balanced,
+          distanceInterval: 5,
+          timeInterval: 3000,
+        },
+        (pos) =>
+          setUserLocation({
+            latitude: pos.coords.latitude,
+            longitude: pos.coords.longitude,
+          }),
+      );
+    };
+    start();
+    return () => {
+      if (sub) sub.remove();
+    };
+  }, []);
+
+  const mapRegion = userLocation
+    ? { ...userLocation, latitudeDelta: 0.01, longitudeDelta: 0.01 }
+    : DEFAULT_REGION;
+
+  const handleCacheSelect = (cache) => {
+    navigation.navigate("GlobalCacheViewScreen", {
+      cache,
+      isFound: foundCacheIds.includes(cache.CacheID),
+      onFindLogged: loadData,
+    });
+  };
+
+  const handleGotoLeaderboard = () => {
+    navigation.navigate("GlobalLeaderboardScreen", { eventId });
+  };
+
+  // View --------------------------------
+
+  if (isLoading) {
+    return (
+      <Screen style={styles.center}>
+        <ActivityIndicator size="large" />
+      </Screen>
+    );
+  }
+
+  return (
+    <Screen showBack>
+      <View style={styles.container}>
+        {/* Tab switcher */}
+        <View style={styles.tabs}>
+          <TabButton
+            label="Map"
+            active={activeTab === "map"}
+            onPress={() => setActiveTab("map")}
+          />
+          <TabButton
+            label="List"
+            active={activeTab === "list"}
+            onPress={() => setActiveTab("list")}
+          />
+        </View>
+
+        {error ? <Text style={styles.error}>{error}</Text> : null}
+
+        {activeTab === "map" ? (
+          <MapView style={styles.map} region={mapRegion} showsUserLocation>
+            {caches.map((cache) => {
+              const found = foundCacheIds.includes(cache.CacheID);
+              return (
+                <Marker
+                  key={cache.CacheID}
+                  coordinate={{
+                    latitude: cache.CacheLatitude,
+                    longitude: cache.CacheLongitude,
+                  }}
+                  title={cache.CacheName}
+                  description={`${cache.CachePoints ?? 0} pts${found ? " · Found" : ""}`}
+                  pinColor={found ? "#22c55e" : "#ef4444"}
+                  onCalloutPress={() => handleCacheSelect(cache)}
+                />
+              );
+            })}
+          </MapView>
+        ) : (
+          <CacheList
+            caches={caches}
+            foundCacheIds={foundCacheIds}
+            onSelect={handleCacheSelect}
+          />
+        )}
+
+        <ButtonTray>
+          <Button label="Leaderboard" onClick={handleGotoLeaderboard} />
+          <Button label="Refresh" onClick={loadData} />
+        </ButtonTray>
+      </View>
+    </Screen>
+  );
+};
+
+const TabButton = ({ label, active, onPress }) => (
+  <Text
+    onPress={onPress}
+    style={[tabStyles.tab, active && tabStyles.activeTab]}
+  >
+    {label}
+  </Text>
+);
+
+const tabStyles = StyleSheet.create({
+  tab: {
+    flex: 1,
+    textAlign: "center",
+    paddingVertical: 8,
+    fontSize: 14,
+    fontWeight: "600",
+    color: "#6b7280",
+    borderBottomWidth: 2,
+    borderBottomColor: "transparent",
+  },
+  activeTab: {
+    color: "#111827",
+    borderBottomColor: "#111827",
+  },
+});
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    gap: 10,
+  },
+  center: {
+    alignItems: "center",
+    justifyContent: "center",
+  },
+  tabs: {
+    flexDirection: "row",
+    borderBottomWidth: 1,
+    borderBottomColor: "#e5e7eb",
+  },
+  map: {
+    flex: 1,
+  },
+  error: {
+    color: "#dc2626",
+    fontSize: 14,
+  },
+});
+
+export default GlobalMapScreen;