diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/gamelogic/Game.java b/src/main/java/ch/unibas/dmi/dbis/cs108/gamelogic/Game.java
index 4fddc93..c29fb1d 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/gamelogic/Game.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/gamelogic/Game.java
@@ -131,7 +131,10 @@ public class Game implements Runnable {
       }
       if (gameOverCheck.equals(ClientGameInfoHandler.gameOverGhostsWin) || gameOverCheck.equals(
           ClientGameInfoHandler.gameOverHumansWin)) {
-        lobby.getAdmin().broadcastAnnouncementToLobby(gameOverCheck); //ToDo(Seraina): adjust for lobby
+        lobby.getAdmin().broadcastAnnouncementToLobby(gameOverCheck);
+        lobby.removeGameFromRunningGames(this);
+        lobby.addGameToFinishedGames(this);
+        lobby.setLobbyIsOpen(true);
         return;
       }
     }
diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/MessageFormatter.java b/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/MessageFormatter.java
index 948e35f..185cb78 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/MessageFormatter.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/client/MessageFormatter.java
@@ -90,6 +90,10 @@ public class MessageFormatter {
           System.out.println("invalid vote");
         }
         stringBuilder.append(Protocol.votedFor + "$" + position + "$");
+        break;
+      case "/s":
+        stringBuilder.append(Protocol.startANewGame);
+
         break;
       default:
         s = msg;
diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java b/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java
index f2e0574..a475f9f 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/ClientHandler.java
@@ -135,7 +135,6 @@ public class ClientHandler implements Runnable {
     try {
       getLobby().getGame().getGameState().changeUsername(helper,newName);
     } catch (NullPointerException e) {
-      LOGGER.warn("No game has been started yet in this lobby");
     }
   }
 
@@ -306,15 +305,27 @@ public class ClientHandler implements Runnable {
   }
 
   /**
-   * Initializes a new Game instance and starts its run method in a new thread
+   * Initializes a new Game instance and starts its run method in a new thread.
+   * Puts the game in the corresponding lobby. Only the admin of this lobby can start a new
+   * game.
    */
   public void startNewGame() {
     try {
       Lobby l = getLobby();
-      Game game = new Game(6,1, l.getLobbyClients().size(), l);
-      l.setGame(game);
-      Thread t = new Thread(game);
-      t.start();
+      if (l.getLobbyIsOpen()) {
+        if (l.getAdmin().equals(this)) {
+          Game game = new Game(6, 1, l.getLobbyClients().size(), l);
+          l.setGame(game);
+          Thread t = new Thread(game);
+          t.start();
+          l.addGameToRunningGames(game);
+          l.setLobbyIsOpen(false);
+        } else {
+          sendAnnouncementToClient("Only the admin can start the game");
+        }
+      } else {
+        sendAnnouncementToClient("The game has already started");
+      }
     } catch (TrainOverflow e) {
       LOGGER.warn(e.getMessage());
     } catch (NullPointerException e) {
@@ -379,7 +390,11 @@ public class ClientHandler implements Runnable {
   public void joinLobby(int i) {
     Lobby l = Lobby.getLobbyFromID(i);
     if (l != null) {
-      l.addPlayer(this);
+      if (l.getLobbyIsOpen()) {
+        l.addPlayer(this);
+      } else {
+        sendAnnouncementToClient("The game in Lobby " + l.getLobbyID() + " has already started");
+      }
     } else {
       sendAnnouncementToClient("Invalid Lobby nr.");
       sendAnnouncementToClient("use LISTL to list lobbies");
@@ -411,7 +426,11 @@ public class ClientHandler implements Runnable {
       sendAnnouncementToClient("No open Lobbies.");
     } else {
       for (Lobby l : Lobby.lobbies) {
-        sendAnnouncementToClient("Lobby nr. " + l.getLobbyID() + ":");
+        String lobbyStatus = "closed";
+        if(l.getLobbyIsOpen()) {
+          lobbyStatus = "open";
+        }
+        sendAnnouncementToClient("Lobby nr. " + l.getLobbyID() + ": (" + lobbyStatus + ")");
         for (ClientHandler c : l.getLobbyClients()) {
           if (c.equals(l.getAdmin())) {
             sendAnnouncementToClient("  -" + c.getClientUserName() + " (admin)");
diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/Lobby.java b/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/Lobby.java
index 0c073f1..21bc958 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/Lobby.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/multiplayer/server/Lobby.java
@@ -17,8 +17,20 @@ public class Lobby {
   public static final Logger LOGGER = LogManager.getLogger();
   public static final BudaLogConfig l = new BudaLogConfig(LOGGER);
   public static HashSet<Lobby> lobbies = new HashSet<>();
-  public Game game;
-  public boolean gameIsOngoing; //TODO(Seraina): getter and setter
+  public static HashSet<Game> runningGames = new HashSet<>();
+  public static HashSet<Game> finishedGames = new HashSet<>();
+  /**
+   * The currently ongoing game, is set, when a game is started
+   */
+  private Game game;
+  /**
+   * true by default
+   * true if game has not started yet, false if game has. If true, potential players can still join the game.
+   * Should be set to true again, after a game is finished.
+   * Games can only be started if Lobby is open.
+   */
+  private boolean lobbyIsOpen = true;
+
 
   private static final int MAX_NO_OF_CLIENTS = 6;
 
@@ -96,6 +108,14 @@ public class Lobby {
     return null;
   }
 
+  public static HashSet<Game> getFinishedGames() {
+    return finishedGames;
+  }
+
+  public static HashSet<Game> getRunningGames() {
+    return runningGames;
+  }
+
   /**
    * Returns the game that the clients in this lobby are in
    *
@@ -105,6 +125,10 @@ public class Lobby {
     return game;
   }
 
+  public boolean getLobbyIsOpen() {
+    return lobbyIsOpen;
+  }
+
   /**
    * Sets the game of this lobby to a certain game
    *
@@ -114,10 +138,16 @@ public class Lobby {
     this.game = game;
   }
 
+  public void setLobbyIsOpen(boolean lobbyIsOpen) {
+    this.lobbyIsOpen = lobbyIsOpen;
+  }
+
   /**
    * Returns the ID of the lobby that the client is in. If the client is not in any
    * lobby, it returns -1.
    */
+
+
   public static int clientIsInLobby(ClientHandler h) {
     for (Lobby l: lobbies) {
       for (ClientHandler clientHandler: l.getLobbyClients()) {
@@ -172,6 +202,18 @@ public class Lobby {
     return false;
   }
 
+  public void addGameToRunningGames(Game game) {
+    runningGames.add(game);
+  }
+
+  public void removeGameFromRunningGames(Game game) {
+    runningGames.remove(game);
+  }
+
+  public  void addGameToFinishedGames(Game game) {
+    finishedGames.add(game);
+  }
+
   /**
    * Closes the lobby.
    *
@@ -179,6 +221,7 @@ public class Lobby {
   public void closeLobby() {
     lobbies.remove(this);
     ClientHandler.broadcastAnnouncementToAll("Lobby nr. " + this.getLobbyID() + " has been closed.");
+
     /*
     Todo: theoretically, this is enough to close a lobby.
      ClientHandlers dont have to manually be removed from the lobby