diff --git a/pom.xml b/pom.xml
index 0fb5e85e..10dce16c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
     <packaging>jar</packaging>
     <groupId>org.telegram</groupId>
     <artifactId>telegrambots</artifactId>
-    <version>2.4.0.BETA3-SNAPSHOT</version>
+    <version>2.4.0.BETA4-SNAPSHOT</version>
 
     <name>Telegram Bots</name>
     <url>https://github.com/rubenlagus/TelegramBots</url>
diff --git a/src/main/java/org/telegram/telegrambots/api/objects/games/CallbackGame.java b/src/main/java/org/telegram/telegrambots/api/objects/games/CallbackGame.java
index 7eb90d97..95b4e7eb 100644
--- a/src/main/java/org/telegram/telegrambots/api/objects/games/CallbackGame.java
+++ b/src/main/java/org/telegram/telegrambots/api/objects/games/CallbackGame.java
@@ -17,80 +17,42 @@
 
 package org.telegram.telegrambots.api.objects.games;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
 
 import org.json.JSONObject;
 import org.telegram.telegrambots.api.interfaces.IBotApiObject;
-import org.telegram.telegrambots.api.interfaces.Validable;
-import org.telegram.telegrambots.exceptions.TelegramApiValidationException;
 
 import java.io.IOException;
 
 /**
  * @author Ruben Bermudez
  * @version 2.4
- * @brief This object contains information about a game that will be returned as a response to a callback query.
+ * @brief This object contains information about a game that will be returned as a response to a
+ * callback query. It has no fields, use BotFather to setup your game,
+ * its short name will actt as an identifier.
  * @date 16 of September of 2016
  */
-public class CallbackGame implements IBotApiObject, Validable {
-    private static final String TITLE_FIELD = "title";
-    private static final String ID_FIELD = "game_id";
-    private static final String START_PARAMETER_FIELD = "start_parameter";
-
-    @JsonProperty(TITLE_FIELD)
-    private String title; ///< Game title, aim at 128 characters or lower
-    @JsonProperty(ID_FIELD)
-    private Integer gameId; ///< Game identifier
-    @JsonProperty(START_PARAMETER_FIELD)
-    private String startParameter; ///< Start parameter for the bot URL when users share the game with others. See deep linking for more info.
-
-    public CallbackGame() {
-        super();
-    }
+public class CallbackGame implements IBotApiObject {
+    private final JSONObject content;
 
     public CallbackGame(JSONObject object) {
         super();
-        title = object.getString(TITLE_FIELD);
-        gameId = object.getInt(ID_FIELD);
-        startParameter = object.getString(START_PARAMETER_FIELD);
+        content = object;
     }
 
-    public String getTitle() {
-        return title;
+    public JSONObject getContent() {
+        return content;
     }
 
-    public Integer getGameId() {
-        return gameId;
-    }
-
-    public String getStartParameter() {
-        return startParameter;
-    }
-
-    @Override
-    public void validate() throws TelegramApiValidationException {
-        if (title == null || title.isEmpty()) {
-            throw new TelegramApiValidationException("Title parameter can't be empty", this);
-        }
-        if (gameId == null) {
-            throw new TelegramApiValidationException("Id parameter can't be empty", this);
-        }
-        if (startParameter == null || startParameter.isEmpty()) {
-            throw new TelegramApiValidationException("StartParameter parameter can't be empty", this);
-        }
+    public String getContentText() {
+        return content.toString();
     }
 
     @Override
     public void serialize(JsonGenerator gen, SerializerProvider serializers) throws IOException {
-        gen.writeStartObject();
-        gen.writeStringField(TITLE_FIELD, title);
-        gen.writeNumberField(ID_FIELD, gameId);
-        gen.writeStringField(START_PARAMETER_FIELD, startParameter);
-        gen.writeEndObject();
-        gen.flush();
+        gen.writeObject(content);
     }
 
     @Override
@@ -101,9 +63,7 @@ public class CallbackGame implements IBotApiObject, Validable {
     @Override
     public String toString() {
         return "CallbackGame{" +
-                "title='" + title + '\'' +
-                ", gameId=" + gameId +
-                ", startParameter='" + startParameter + '\'' +
+                "content=" + content +
                 '}';
     }
 }
diff --git a/src/main/java/org/telegram/telegrambots/api/objects/replykeyboard/buttons/InlineKeyboardButton.java b/src/main/java/org/telegram/telegrambots/api/objects/replykeyboard/buttons/InlineKeyboardButton.java
index 6a044534..0931cc35 100644
--- a/src/main/java/org/telegram/telegrambots/api/objects/replykeyboard/buttons/InlineKeyboardButton.java
+++ b/src/main/java/org/telegram/telegrambots/api/objects/replykeyboard/buttons/InlineKeyboardButton.java
@@ -147,9 +147,6 @@ public class InlineKeyboardButton implements IBotApiObject, IToJson, Validable {
         if (text == null || text.isEmpty()) {
             throw new TelegramApiValidationException("Text parameter can't be empty", this);
         }
-        if (callbackGame != null) {
-            callbackGame.validate();
-        }
     }
 
     @Override