diff --git a/src/main/java/xyz/nucleoid/plasmid/command/GameCommand.java b/src/main/java/xyz/nucleoid/plasmid/command/GameCommand.java
index adf69c99..3e8e77ae 100644
--- a/src/main/java/xyz/nucleoid/plasmid/command/GameCommand.java
+++ b/src/main/java/xyz/nucleoid/plasmid/command/GameCommand.java
@@ -19,11 +19,7 @@
 import xyz.nucleoid.plasmid.command.argument.GameConfigArgument;
 import xyz.nucleoid.plasmid.command.argument.GameSpaceArgument;
 import xyz.nucleoid.plasmid.command.ui.GameJoinUi;
-import xyz.nucleoid.plasmid.game.GameCloseReason;
-import xyz.nucleoid.plasmid.game.GameOpenException;
-import xyz.nucleoid.plasmid.game.GameSpace;
-import xyz.nucleoid.plasmid.game.GameTexts;
-import xyz.nucleoid.plasmid.game.ListedGameSpace;
+import xyz.nucleoid.plasmid.game.*;
 import xyz.nucleoid.plasmid.game.config.GameConfig;
 import xyz.nucleoid.plasmid.game.config.GameConfigList;
 import xyz.nucleoid.plasmid.game.config.GameConfigLists;
@@ -312,7 +308,7 @@ private static void tryJoinGame(ServerPlayerEntity player, ListedGameSpace gameS
     }
 
     private static ListedGameSpace getJoinableGameSpace() throws CommandSyntaxException {
-        return GameSpaceManager.get().getOpenGameSpaces().stream()
+        return GameSpaceLists.composite().getOpenGameSpaces().stream()
                 .max(Comparator.comparingInt(space -> space.getPlayers().size()))
                 .orElseThrow(NO_GAME_OPEN::create);
     }
diff --git a/src/main/java/xyz/nucleoid/plasmid/command/argument/GameSpaceArgument.java b/src/main/java/xyz/nucleoid/plasmid/command/argument/GameSpaceArgument.java
index 02812baa..81f2403f 100644
--- a/src/main/java/xyz/nucleoid/plasmid/command/argument/GameSpaceArgument.java
+++ b/src/main/java/xyz/nucleoid/plasmid/command/argument/GameSpaceArgument.java
@@ -10,8 +10,8 @@
 import net.minecraft.server.command.ServerCommandSource;
 import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
+import xyz.nucleoid.plasmid.game.GameSpaceLists;
 import xyz.nucleoid.plasmid.game.ListedGameSpace;
-import xyz.nucleoid.plasmid.game.manager.GameSpaceManager;
 
 public final class GameSpaceArgument {
     private static final SimpleCommandExceptionType GAME_NOT_FOUND = new SimpleCommandExceptionType(Text.translatable("text.plasmid.game.not_found"));
@@ -19,10 +19,10 @@ public final class GameSpaceArgument {
     public static RequiredArgumentBuilder<ServerCommandSource, Identifier> argument(String name) {
         return CommandManager.argument(name, IdentifierArgumentType.identifier())
                 .suggests((context, builder) -> {
-                    var gameSpaceManager = GameSpaceManager.get();
+                    var gameSpaceList = GameSpaceLists.composite();
 
                     return CommandSource.suggestIdentifiers(
-                            gameSpaceManager.getOpenGameSpaces().stream().map(space -> space.getMetadata().userId()),
+                            gameSpaceList.getOpenGameSpaces().stream().map(space -> space.getMetadata().userId()),
                             builder
                     );
                 });
@@ -31,7 +31,7 @@ public static RequiredArgumentBuilder<ServerCommandSource, Identifier> argument(
     public static ListedGameSpace get(CommandContext<ServerCommandSource> context, String name) throws CommandSyntaxException {
         var identifier = IdentifierArgumentType.getIdentifier(context, name);
 
-        var gameSpace = GameSpaceManager.get().byUserId(identifier);
+        var gameSpace = GameSpaceLists.composite().byUserId(identifier);
         if (gameSpace == null) {
             throw GAME_NOT_FOUND.create();
         }
diff --git a/src/main/java/xyz/nucleoid/plasmid/command/ui/GameJoinUi.java b/src/main/java/xyz/nucleoid/plasmid/command/ui/GameJoinUi.java
index 1ae41b76..fe718be2 100644
--- a/src/main/java/xyz/nucleoid/plasmid/command/ui/GameJoinUi.java
+++ b/src/main/java/xyz/nucleoid/plasmid/command/ui/GameJoinUi.java
@@ -10,10 +10,8 @@
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.math.MathHelper;
-import xyz.nucleoid.plasmid.game.GameSpace;
+import xyz.nucleoid.plasmid.game.GameSpaceLists;
 import xyz.nucleoid.plasmid.game.ListedGameSpace;
-import xyz.nucleoid.plasmid.game.manager.GameSpaceManager;
-import xyz.nucleoid.plasmid.game.manager.ManagedGameSpace;
 import xyz.nucleoid.plasmid.game.player.GamePlayerJoiner;
 import xyz.nucleoid.plasmid.util.Guis;
 
@@ -54,7 +52,7 @@ private void updateUi() {
         int i = 0;
         int gameI = 0;
 
-        var games = new ArrayList<>(GameSpaceManager.get().getOpenGameSpaces());
+        var games = new ArrayList<>(GameSpaceLists.composite().getOpenGameSpaces());
         games.sort(Comparator.comparingInt(space -> -space.getPlayers().size()));
 
         int limit = this.size;
diff --git a/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceList.java b/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceList.java
index 5c075d8e..d6cc66f4 100644
--- a/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceList.java
+++ b/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceList.java
@@ -4,9 +4,29 @@
 import org.jetbrains.annotations.Nullable;
 
 import java.util.Collection;
+import java.util.List;
 import java.util.UUID;
 
 public interface GameSpaceList {
+    GameSpaceList EMPTY = new GameSpaceList() {
+        @Override
+        public Collection<? extends ListedGameSpace> getOpenGameSpaces() {
+            return List.of();
+        }
+
+        @Override
+        @Nullable
+        public ListedGameSpace byId(UUID id) {
+            return null;
+        }
+
+        @Override
+        @Nullable
+        public ListedGameSpace byUserId(Identifier userId) {
+            return null;
+        }
+    };
+
     Collection<? extends ListedGameSpace> getOpenGameSpaces();
 
     @Nullable
diff --git a/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceLists.java b/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceLists.java
new file mode 100644
index 00000000..a50c7b32
--- /dev/null
+++ b/src/main/java/xyz/nucleoid/plasmid/game/GameSpaceLists.java
@@ -0,0 +1,68 @@
+package xyz.nucleoid.plasmid.game;
+
+import net.minecraft.util.Identifier;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.UUID;
+
+public final class GameSpaceLists {
+    private static final List<GameSpaceList> REGISTRY = new ArrayList<>();
+    private static GameSpaceList composite = GameSpaceList.EMPTY;
+
+    private GameSpaceLists() {
+    }
+
+    public static GameSpaceList composite() {
+        return composite;
+    }
+
+    public static void register(GameSpaceList list) {
+        REGISTRY.add(list);
+        composite = buildCompositeList(List.copyOf(REGISTRY));
+    }
+
+    public static void unregister(GameSpaceList list) {
+        REGISTRY.remove(list);
+        composite = buildCompositeList(List.copyOf(REGISTRY));
+    }
+
+    private static GameSpaceList buildCompositeList(List<GameSpaceList> registry) {
+        return new GameSpaceList() {
+            @Override
+            public Collection<? extends ListedGameSpace> getOpenGameSpaces() {
+                var result = new ArrayList<ListedGameSpace>();
+                for (var list : registry) {
+                    result.addAll(list.getOpenGameSpaces());
+                }
+                return result;
+            }
+
+            @Override
+            @Nullable
+            public ListedGameSpace byId(UUID id) {
+                for (var list : registry) {
+                    var gameSpace = list.byId(id);
+                    if (gameSpace != null) {
+                        return gameSpace;
+                    }
+                }
+                return null;
+            }
+
+            @Override
+            @Nullable
+            public ListedGameSpace byUserId(Identifier userId) {
+                for (var list : registry) {
+                    var gameSpace = list.byUserId(userId);
+                    if (gameSpace != null) {
+                        return gameSpace;
+                    }
+                }
+                return null;
+            }
+        };
+    }
+}
diff --git a/src/main/java/xyz/nucleoid/plasmid/game/manager/GameSpaceManager.java b/src/main/java/xyz/nucleoid/plasmid/game/manager/GameSpaceManager.java
index e3aec98d..35f8abdc 100644
--- a/src/main/java/xyz/nucleoid/plasmid/game/manager/GameSpaceManager.java
+++ b/src/main/java/xyz/nucleoid/plasmid/game/manager/GameSpaceManager.java
@@ -14,10 +14,7 @@
 import org.jetbrains.annotations.Nullable;
 import xyz.nucleoid.plasmid.Plasmid;
 import xyz.nucleoid.plasmid.event.GameEvents;
-import xyz.nucleoid.plasmid.game.GameCloseReason;
-import xyz.nucleoid.plasmid.game.GameOpenProcedure;
-import xyz.nucleoid.plasmid.game.GameSpaceList;
-import xyz.nucleoid.plasmid.game.GameSpaceMetadata;
+import xyz.nucleoid.plasmid.game.*;
 import xyz.nucleoid.plasmid.game.config.GameConfig;
 import xyz.nucleoid.stimuli.EventSource;
 import xyz.nucleoid.stimuli.Stimuli;
@@ -75,7 +72,11 @@ public static GameSpaceManager get() {
     }
 
     private static void updateInstance(@Nullable GameSpaceManager instance) {
+        if (GameSpaceManager.instance != null) {
+            GameSpaceLists.unregister(GameSpaceManager.instance);
+        }
         GameSpaceManager.instance = instance;
+        GameSpaceLists.register(instance);
     }
 
     public CompletableFuture<ManagedGameSpace> open(GameConfig<?> config) {