diff --git a/GoldWars/GoldWars/Entities/EntityManager.swift b/GoldWars/GoldWars/Entities/EntityManager.swift
index 69cda81..ebeec1b 100644
--- a/GoldWars/GoldWars/Entities/EntityManager.swift
+++ b/GoldWars/GoldWars/Entities/EntityManager.swift
@@ -118,6 +118,7 @@ class EntityManager {
                         scene.addChild(fire)
                     }
                 }
+                GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.capture.fifty.bases", increasePercentComplete: 2)
             }
         }
     }
diff --git a/GoldWars/GoldWars/Entities/HUD.swift b/GoldWars/GoldWars/Entities/HUD.swift
index 24f92a0..324e742 100644
--- a/GoldWars/GoldWars/Entities/HUD.swift
+++ b/GoldWars/GoldWars/Entities/HUD.swift
@@ -50,21 +50,33 @@ class HUD: GKEntity {
             text: "Spy",
             isEnabled: true,
             position: CGPoint(x: EntityManager.gameEMInstance.scene.size.width * 0.75, y: EntityManager.gameEMInstance.scene.size.height * 0.1),
-            onButtonPress: { print("Not implemented") }
+            onButtonPress: {
+                print("Not implemented")
+                GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.skill.first.time", increasePercentComplete: 100)
+                GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.skill.spy.ten", increasePercentComplete: 10)
+            }
         )
         defSkill = SingeClickButtonNode(
             textureName: "yellow_circle",
             text: "Def",
             isEnabled: true,
             position: CGPoint(x: EntityManager.gameEMInstance.scene.size.width * 0.85, y: EntityManager.gameEMInstance.scene.size.height * 0.1),
-            onButtonPress: {DataService.sharedInstance.localRoundData.hasDefenceBoost = true}
+            onButtonPress: {
+                DataService.sharedInstance.localRoundData.hasDefenceBoost = true
+                GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.skill.first.time", increasePercentComplete: 100)
+                GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.skill.def.ten", increasePercentComplete: 10)
+            }
         )
         atkSkill = SingeClickButtonNode(
             textureName: "yellow_circle",
             text: "Atk",
             isEnabled: true,
             position: CGPoint(x: EntityManager.gameEMInstance.scene.size.width * 0.95, y: EntityManager.gameEMInstance.scene.size.height * 0.1),
-            onButtonPress: {DataService.sharedInstance.localRoundData.hasAttackBoost = true}
+            onButtonPress: {
+            	DataService.sharedInstance.localRoundData.hasAttackBoost = true
+            	GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.skill.first.time", increasePercentComplete: 100)
+                GameCenterManager.sharedInstance.addAchievementProgress(identifier: "de.hft.stuttgart.ip2.goldwars.skill.atk.ten", increasePercentComplete: 10)
+            }
         )
         
         finishButton = SingeClickButtonNode(
diff --git a/GoldWars/GoldWars/GameCenterManager.swift b/GoldWars/GoldWars/GameCenterManager.swift
index e159b18..64bfd7a 100644
--- a/GoldWars/GoldWars/GameCenterManager.swift
+++ b/GoldWars/GoldWars/GameCenterManager.swift
@@ -25,7 +25,7 @@ struct State: Codable {
     let state: Int
 }
 
-final class GameCenterManager: NSObject, GKMatchmakerViewControllerDelegate ,GKMatchDelegate,GKLocalPlayerListener{
+final class GameCenterManager: NSObject, GKMatchmakerViewControllerDelegate, GKGameCenterControllerDelegate ,GKMatchDelegate,GKLocalPlayerListener{
     
     static let sharedInstance = GameCenterManager()
     
@@ -75,6 +75,38 @@ final class GameCenterManager: NSObject, GKMatchmakerViewControllerDelegate ,GKM
         viewController?.present(matchmakerVC!, animated: true, completion: nil)
     }
     
+    func presentGameCenter() {
+        let gameCenterController: GKGameCenterViewController = GKGameCenterViewController.init()
+        gameCenterController.gameCenterDelegate = self
+        gameCenterController.viewState = .achievements
+        viewController?.present(gameCenterController, animated: true, completion: nil)
+    }
+    
+    func addAchievementProgress(identifier: String, increasePercentComplete: Double) {
+        GKAchievement.loadAchievements { (achievements: [GKAchievement]?, err: Error?) in
+            var achievementExists: Bool = false
+            achievements?.forEach({ (achievement: GKAchievement) in
+                print(achievement.identifier)
+                if achievement.identifier == identifier {
+                    achievementExists = true
+                    achievement.percentComplete += increasePercentComplete
+                    achievement.showsCompletionBanner = true
+                    GKAchievement.report([achievement]) { (error) in
+                      print(error?.localizedDescription ?? "")
+                    }
+                }
+            })
+            if !achievementExists {
+                let newAchievement: GKAchievement = GKAchievement.init(identifier: identifier)
+                newAchievement.showsCompletionBanner = true
+                newAchievement.percentComplete = increasePercentComplete
+                GKAchievement.report([newAchievement]) { (error) in
+                  print(error?.localizedDescription ?? "")
+                }
+            }
+        }
+    }
+    
     func match(_ match: GKMatch, didReceive data: Data, fromRemotePlayer player: GKPlayer) {
         if myMatch != match { return }
         let jsonDecoder = JSONDecoder()
@@ -206,6 +238,10 @@ final class GameCenterManager: NSObject, GKMatchmakerViewControllerDelegate ,GKM
         }
     }
     
+    func gameCenterViewControllerDidFinish(_ gameCenterViewController: GKGameCenterViewController) {
+        gameCenterViewController.dismiss(animated: true, completion: nil)
+    }
+    
     func disconnect() {
         if myMatch != nil {
             myMatch?.disconnect()
diff --git a/GoldWars/GoldWars/Scenes/MenuScene.swift b/GoldWars/GoldWars/Scenes/MenuScene.swift
index 6281713..82469a3 100644
--- a/GoldWars/GoldWars/Scenes/MenuScene.swift
+++ b/GoldWars/GoldWars/Scenes/MenuScene.swift
@@ -42,6 +42,17 @@ class MenuScene: SKScene {
                                     let scene = SettingsScene(size: self.size)
                                     self.loadScene(scene: scene)
         }))
+        entityManager.add(Button(name: "gameCenterButton",
+                                 textureName: "yellow_button04",
+                                 text: "GameCenter",
+                                 position: CGPoint(x: midX, y: midY - 160),
+                                 onButtonPress: {
+                                    if GameCenterManager.isAuthenticated {
+                                         GameCenterManager.sharedInstance.presentGameCenter()
+                                    }else {
+                                        GameCenterManager.sharedInstance.authUser()
+                                    }
+        }))
         entityManager.add(Background(size: self.size))
         entityManager.add(SpinningLogoEntity(position: CGPoint(x: midX, y: midY + 200)))