diff --git a/fh.fd.ci.server/src/main/java/de/fd/fh/server/game/web/GameController.java b/fh.fd.ci.server/src/main/java/de/fd/fh/server/game/web/GameController.java
index 6b40163..c4f08fd 100644
--- a/fh.fd.ci.server/src/main/java/de/fd/fh/server/game/web/GameController.java
+++ b/fh.fd.ci.server/src/main/java/de/fd/fh/server/game/web/GameController.java
@@ -1,5 +1,6 @@
 package de.fd.fh.server.game.web;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.fd.fh.server.game.Game;
 import de.fd.fh.server.game.GameId;
@@ -11,6 +12,7 @@ import spark.Request;
 import spark.Response;
 
 import java.io.IOException;
+import java.util.List;
 
 @RequiredArgsConstructor
 public class GameController
@@ -39,15 +41,15 @@ public class GameController
         }
     }
 
-    public void finGameById(final Request request, final Response response) throws IOException
+    public void findGameById(final Request request, final Response response) throws JsonProcessingException
     {
-        final GameId gameId = GameId.of(request.params(":gameId"));
+        final GameId gameId = GameId.of(request.params(":game_id"));
 
         final Game game = service.findGameById(gameId);
 
         if (game == null)
         {
-            response.status(400);
+            response.status(404);
         }
         else
         {
@@ -55,4 +57,21 @@ public class GameController
             response.status(200);
         }
     }
+
+    public void findRunningGamesOfUser(final Request request, final Response response) throws JsonProcessingException
+    {
+        final UserId userId = UserId.of(request.params(":user_id"));
+
+        final List<Game> games = service.findRunningGamesOfUser(userId);
+
+        if (games == null)
+        {
+            response.status(404);
+        }
+        else
+        {
+            response.body(objectMapper.writeValueAsString(games));
+            response.status(200);
+        }
+    }
 }
diff --git a/fh.fd.ci.server/src/test/java/de/fd/fh/server/game/web/GameControllerTest.java b/fh.fd.ci.server/src/test/java/de/fd/fh/server/game/web/GameControllerTest.java
index acefb51..2b848d9 100644
--- a/fh.fd.ci.server/src/test/java/de/fd/fh/server/game/web/GameControllerTest.java
+++ b/fh.fd.ci.server/src/test/java/de/fd/fh/server/game/web/GameControllerTest.java
@@ -1,5 +1,6 @@
 package de.fd.fh.server.game.web;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import de.fd.fh.server.game.Game;
 import de.fd.fh.server.game.GameId;
 import de.fd.fh.server.game.GameService;
@@ -12,6 +13,7 @@ import spark.Request;
 import spark.Response;
 
 import java.io.IOException;
+import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.*;
 import static org.mockito.ArgumentMatchers.any;
@@ -79,7 +81,7 @@ public class GameControllerTest
         final ArgumentCaptor<String> bodyCaptor = ArgumentCaptor.forClass(String.class);
         final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
 
-        new GameController(service).finGameById(request, response);
+        new GameController(service).findGameById(request, response);
 
         verify(response).body(bodyCaptor.capture());
         verify(response).status(statusCaptor.capture());
@@ -98,11 +100,47 @@ public class GameControllerTest
 
         final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
 
-        new GameController(service).finGameById(request, response);
+        new GameController(service).findGameById(request, response);
 
         verify(response).status(statusCaptor.capture());
 
         assertNotNull(statusCaptor.getValue());
-        assertEquals(400, statusCaptor.getValue());
+        assertEquals(404, statusCaptor.getValue());
+    }
+
+    @Test
+    void testFindRunningGamesOfUser() throws JsonProcessingException
+    {
+        when(request.params(any())).thenReturn("12345");
+        when(service.findRunningGamesOfUser(any())).thenReturn(List.of(new Game(), new Game()));
+
+        final ArgumentCaptor<String> bodyCaptor = ArgumentCaptor.forClass(String.class);
+        final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
+
+        new GameController(service).findRunningGamesOfUser(request, response);
+
+        verify(response).body(bodyCaptor.capture());
+        verify(response).status(statusCaptor.capture());
+
+        assertNotNull(bodyCaptor.getValue());
+
+        assertNotNull(statusCaptor.getValue());
+        assertEquals(200, statusCaptor.getValue());
+    }
+
+    @Test
+    void testFailedFindRunningGamesOfUser() throws JsonProcessingException
+    {
+        when(request.params(any())).thenReturn("12345");
+        when(service.findRunningGamesOfUser(any())).thenReturn(null);
+
+        final ArgumentCaptor<Integer> statusCaptor = ArgumentCaptor.forClass(Integer.class);
+
+        new GameController(service).findRunningGamesOfUser(request, response);
+
+        verify(response).status(statusCaptor.capture());
+
+        assertNotNull(statusCaptor.getValue());
+        assertEquals(404, statusCaptor.getValue());
     }
 }