diff --git a/common/GameCommon.js b/common/GameCommon.js
index 92a1318..60dfd9e 100644
--- a/common/GameCommon.js
+++ b/common/GameCommon.js
@@ -2,19 +2,19 @@ import Geometry from './Geometry.js'
 import Protocol from './Protocol.js'
 import Util from './Util.js'
 
+// Map<gameId, GameObject>
 const GAMES = {}
 
 function exists(gameId) {
   return (!!GAMES[gameId]) || false
 }
 
-function __createGameObject(id, rng, puzzle, players, sockets, evtInfos) {
+function __createGameObject(id, rng, puzzle, players, evtInfos) {
   return {
     id: id,
     rng: rng,
     puzzle: puzzle,
     players: players,
-    sockets: sockets,
     evtInfos: evtInfos,
   }
 }
@@ -33,8 +33,8 @@ function __createPlayerObject(id, ts) {
   }
 }
 
-function newGame({id, rng, puzzle, players, sockets, evtInfos}) {
-  const game = __createGameObject(id, rng, puzzle, players, sockets, evtInfos)
+function newGame({id, rng, puzzle, players, evtInfos}) {
+  const game = __createGameObject(id, rng, puzzle, players, evtInfos)
   setGame(id, game)
   return game
 }
@@ -116,21 +116,6 @@ function addPlayer(gameId, playerId, ts) {
   }
 }
 
-function socketExists(gameId, socket) {
-  return GAMES[gameId].sockets.includes(socket)
-}
-
-function addSocket(gameId, socket) {
-  if (!GAMES[gameId].sockets.includes(socket)) {
-    console.log('adding socket: ', gameId, socket.protocol)
-    GAMES[gameId].sockets.push(socket)
-  }
-}
-
-function removeSocket(gameId, socket) {
-  GAMES[gameId].sockets = GAMES[gameId].sockets.filter(s => s !== socket)
-}
-
 function getAllGames() {
   return Object.values(GAMES).sort((a, b) => {
     // when both have same finished state, sort by started
@@ -179,10 +164,6 @@ function getTilesSortedByZIndex(gameId) {
   return tiles.sort((t1, t2) => t1.z - t2.z)
 }
 
-function getSockets(gameId) {
-  return GAMES[gameId].sockets
-}
-
 function changePlayer(gameId, playerId, change) {
   const player = getPlayer(gameId, playerId)
   for (let k of Object.keys(change)) {
@@ -655,15 +636,11 @@ export default {
   getRelevantPlayers,
   getActivePlayers,
   addPlayer,
-  socketExists,
-  addSocket,
-  removeSocket,
   getFinishedTileCount,
   getTileCount,
   getImageUrl,
   get,
   getAllGames,
-  getSockets,
   getPlayerBgColor,
   getPlayerColor,
   getPlayerName,
diff --git a/server/Game.js b/server/Game.js
index 11a4bb0..70dfa67 100644
--- a/server/Game.js
+++ b/server/Game.js
@@ -40,7 +40,6 @@ function loadAllGames() {
       },
       puzzle: game.puzzle,
       players: game.players,
-      sockets: [],
       evtInfos: {}
     })
   }
@@ -58,7 +57,6 @@ async function createGameObject(gameId, targetTiles, image, ts) {
     },
     await createPuzzle(rng, targetTiles, image, ts),
     [],
-    [],
     {}
   )
 }
@@ -76,7 +74,6 @@ async function createGame(gameId, targetTiles, image, ts) {
     },
     puzzle: await createPuzzle(rng, targetTiles, image, ts),
     players: [],
-    sockets: [],
     evtInfos: {},
   })
 
@@ -97,11 +94,6 @@ function addPlayer(gameId, playerId, ts) {
   changedGames[gameId] = true
 }
 
-function addSocket(gameId, socket) {
-  GameCommon.addSocket(gameId, socket)
-  changedGames[gameId] = true
-}
-
 function handleInput(gameId, playerId, input, ts) {
   const idx = GameCommon.getPlayerIndexById(gameId, playerId)
   const diff = ts - GameCommon.getStartTs(gameId)
@@ -136,7 +128,6 @@ export default {
   persistChangedGames,
   createGame,
   addPlayer,
-  addSocket,
   handleInput,
   getAllGames: GameCommon.getAllGames,
   getRelevantPlayers: GameCommon.getRelevantPlayers,
@@ -146,10 +137,7 @@ export default {
   getTileCount: GameCommon.getTileCount,
   exists: GameCommon.exists,
   playerExists: GameCommon.playerExists,
-  socketExists: GameCommon.socketExists,
-  removeSocket: GameCommon.removeSocket,
   get: GameCommon.get,
-  getSockets: GameCommon.getSockets,
   getStartTs: GameCommon.getStartTs,
   getFinishTs: GameCommon.getFinishTs,
 }
diff --git a/server/GameSockets.js b/server/GameSockets.js
new file mode 100644
index 0000000..c8e32c0
--- /dev/null
+++ b/server/GameSockets.js
@@ -0,0 +1,43 @@
+// Map<gameId, Socket[]>
+const SOCKETS = {}
+
+function socketExists(gameId, socket) {
+  if (!(gameId in SOCKETS)) {
+    return false
+  }
+  return SOCKETS[gameId].includes(socket)
+}
+
+function removeSocket(gameId, socket) {
+  if (!(gameId in SOCKETS)) {
+    return
+  }
+  SOCKETS[gameId] = SOCKETS[gameId].filter(s => s !== socket)
+  console.log('removed socket: ', gameId, socket.protocol)
+  console.log('socket count: ', Object.keys(SOCKETS[gameId]).length)
+}
+
+function addSocket(gameId, socket) {
+  if (!(gameId in SOCKETS)) {
+    SOCKETS[gameId] = []
+  }
+  if (!SOCKETS[gameId].includes(socket)) {
+    SOCKETS[gameId].push(socket)
+    console.log('added socket: ', gameId, socket.protocol)
+    console.log('socket count: ', Object.keys(SOCKETS[gameId]).length)
+  }
+}
+
+function getSockets(gameId) {
+  if (!(gameId in SOCKETS)) {
+    return []
+  }
+  return SOCKETS[gameId]
+}
+
+export default {
+  addSocket,
+  removeSocket,
+  socketExists,
+  getSockets,
+}
diff --git a/server/index.js b/server/index.js
index 1ea29cb..16f240c 100644
--- a/server/index.js
+++ b/server/index.js
@@ -12,6 +12,7 @@ import bodyParser from 'body-parser'
 import v8 from 'v8'
 import { Rng } from '../common/Rng.js'
 import GameLog from './GameLog.js'
+import GameSockets from './GameSockets.js'
 
 const allImages = () => [
   ...fs.readdirSync('./../data/uploads/').map(f => ({
@@ -124,7 +125,7 @@ wss.on('close', async ({socket}) => {
   const clientId = proto[0]
   const gameId = proto[1]
   if (Game.exists(gameId)) {
-    Game.removeSocket(gameId, socket)
+    GameSockets.removeSocket(gameId, socket)
   }
 })
 
@@ -153,7 +154,6 @@ wss.on('message', async ({socket, data}) => {
             },
             puzzle: game.puzzle,
             players: game.players,
-            sockets: [],
             evtInfos: game.evtInfos,
           }, log],
           [socket]
@@ -166,7 +166,7 @@ wss.on('message', async ({socket, data}) => {
         }
         const ts = Util.timestamp()
         Game.addPlayer(gameId, clientId, ts)
-        Game.addSocket(gameId, socket)
+        GameSockets.addSocket(gameId, socket)
         const game = Game.get(gameId)
         notify(
           [Protocol.EV_SERVER_INIT, {
@@ -177,7 +177,6 @@ wss.on('message', async ({socket, data}) => {
             },
             puzzle: game.puzzle,
             players: game.players,
-            sockets: [],
             evtInfos: game.evtInfos,
           }],
           [socket]
@@ -190,7 +189,7 @@ wss.on('message', async ({socket, data}) => {
         const ts = Util.timestamp()
 
         Game.addPlayer(gameId, clientId, ts)
-        Game.addSocket(gameId, socket)
+        GameSockets.addSocket(gameId, socket)
 
         const game = Game.get(gameId)
         notify(
@@ -198,7 +197,6 @@ wss.on('message', async ({socket, data}) => {
             id: game.id,
             puzzle: game.puzzle,
             players: game.players,
-            sockets: [],
             evtInfos: game.evtInfos,
           }],
           [socket]
@@ -206,7 +204,7 @@ wss.on('message', async ({socket, data}) => {
         const changes = Game.handleInput(gameId, clientId, clientEvtData, ts)
         notify(
           [Protocol.EV_SERVER_EVENT, clientId, clientSeq, changes],
-          Game.getSockets(gameId)
+          GameSockets.getSockets(gameId)
         )
       } break;
     }