diff --git a/Content/BattleField/BP_EndOfGameWidget.uasset b/Content/BattleField/BP_EndOfGameWidget.uasset
new file mode 100644
index 0000000..91d6502
Binary files /dev/null and b/Content/BattleField/BP_EndOfGameWidget.uasset differ
diff --git a/Content/BattleField/BP_MyPlayerState.uasset b/Content/BattleField/BP_MyPlayerState.uasset
index 6aa028c..31d3e7a 100644
Binary files a/Content/BattleField/BP_MyPlayerState.uasset and b/Content/BattleField/BP_MyPlayerState.uasset differ
diff --git a/Content/BattleField/Multiplayer/BP_MyGameState.uasset b/Content/BattleField/Multiplayer/BP_MyGameState.uasset
index b40b693..954272f 100644
Binary files a/Content/BattleField/Multiplayer/BP_MyGameState.uasset and b/Content/BattleField/Multiplayer/BP_MyGameState.uasset differ
diff --git a/Content/BattleField/SinglePlayer/BP_SinglePlayerGS.uasset b/Content/BattleField/SinglePlayer/BP_SinglePlayerGS.uasset
index 649a0e6..31f2b76 100644
Binary files a/Content/BattleField/SinglePlayer/BP_SinglePlayerGS.uasset and b/Content/BattleField/SinglePlayer/BP_SinglePlayerGS.uasset differ
diff --git a/Source/TurnBasedTutorial/EnemyAIController.cpp b/Source/TurnBasedTutorial/EnemyAIController.cpp
index 2456825..68fcde5 100644
--- a/Source/TurnBasedTutorial/EnemyAIController.cpp
+++ b/Source/TurnBasedTutorial/EnemyAIController.cpp
@@ -117,6 +117,9 @@ void AEnemyAIController::MakeMove() {
             return;
         }
         const int Index = GetClosestTrooper();
+        if (Index == -1) {
+            return;
+        }
         bool failed;
         if (!IsCloseEnough(Index)) {
             failed = MoveTo(Index);
@@ -185,7 +188,7 @@ void AEnemyAIController::InitializeSpawnPoints() {
 
 int AEnemyAIController::GetClosestTrooper() const {
     float minDistance = 1000000.0f;
-    int minIndex = 0;
+    int minIndex = -1;
     const ATrooper *CurrentTrooper = PossessedTroopers[TroopersCursor];
     for (int index = 0; index < PlayerTroopers.Num(); ++index) {
         const ATrooper *OtherTrooper = PlayerTroopers[index];
diff --git a/Source/TurnBasedTutorial/GameOverWidget.cpp b/Source/TurnBasedTutorial/GameOverWidget.cpp
new file mode 100644
index 0000000..92afb95
--- /dev/null
+++ b/Source/TurnBasedTutorial/GameOverWidget.cpp
@@ -0,0 +1,13 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#include "GameOverWidget.h"
+#include "Components/TextBlock.h"
+
+
+void UGameOverWidget::SetWidgetText_Implementation(bool HasWon) {
+    if (HasWon) {
+        GameOverText->SetText(FText::FromString("You won!"));
+    } else {
+        GameOverText->SetText(FText::FromString("You lose!"));
+    }
+}
diff --git a/Source/TurnBasedTutorial/GameOverWidget.h b/Source/TurnBasedTutorial/GameOverWidget.h
new file mode 100644
index 0000000..5bee377
--- /dev/null
+++ b/Source/TurnBasedTutorial/GameOverWidget.h
@@ -0,0 +1,26 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Blueprint/UserWidget.h"
+#include "GameOverWidget.generated.h"
+
+/**
+ * 
+ */
+UCLASS()
+class TURNBASEDTUTORIAL_API UGameOverWidget : public UUserWidget {
+    GENERATED_BODY()
+
+public:
+    UFUNCTION(Client, Reliable)
+    void SetWidgetText(bool HasWon);
+
+protected:
+    UPROPERTY(meta = (BindWidget))
+    class UButton *ButtonToMenu;
+
+    UPROPERTY(meta = (BindWidget))
+    class UTextBlock *GameOverText;
+};
diff --git a/Source/TurnBasedTutorial/MyGameState.cpp b/Source/TurnBasedTutorial/MyGameState.cpp
index ee2bed3..45ed445 100644
--- a/Source/TurnBasedTutorial/MyGameState.cpp
+++ b/Source/TurnBasedTutorial/MyGameState.cpp
@@ -2,8 +2,10 @@
 
 #include "MyGameState.h"
 
+// #include "GameOverWidget.h"
 #include "MyPlayerState.h"
 #include "Trooper.h"
+#include "Blueprint/UserWidget.h"
 #include "Net/UnrealNetwork.h"
 
 auto AMyGameState::GetMyPlayerState(uint8 PlayerIndex) const {
@@ -90,9 +92,24 @@ void AMyGameState::DecreaseLivingTroopers(int PlayerIndex) {
     if (LivingTroopersCount[PlayerIndex] <= 0) {
         UE_LOG(LogTemp, Warning, TEXT("Player %d lose!"), PlayerIndex);
         bGameIsOver = true;
+        GameOver(PlayerIndex);
     }
 }
 
+void AMyGameState::GameOver(int PlayerIndexLose) const {
+    Cast<AMyPlayerState>(PlayerArray[0])->GameOver(PlayerIndexLose);
+    if (bIsMultiplayer) {
+        Cast<AMyPlayerState>(PlayerArray[1])->GameOver(PlayerIndexLose);
+    }
+}
+
+// void AMyGameState::GameOver_Implementation(int PlayerIndexLose) {
+//     UGameOverWidget *CreatedWidget = CreateWidget<UGameOverWidget>(
+//         GetWorld(), GameOverWidgetClass);
+//     CreatedWidget->AddToViewport();
+//     CreatedWidget->SetWidgetText(PlayerIndexLose != );
+// }
+
 
 void AMyGameState::GetLifetimeReplicatedProps(
     TArray<FLifetimeProperty> &OutLifetimeProps) const {
diff --git a/Source/TurnBasedTutorial/MyGameState.h b/Source/TurnBasedTutorial/MyGameState.h
index 00817bb..1a30b60 100644
--- a/Source/TurnBasedTutorial/MyGameState.h
+++ b/Source/TurnBasedTutorial/MyGameState.h
@@ -45,8 +45,14 @@ public:
 
     UFUNCTION()
     void DecreaseLivingTroopers(int PlayerIndex);
+    
+    UFUNCTION()
+    void GameOver(int PlayerIndexLose) const;
 
 protected:
+    // UPROPERTY(EditAnywhere, BlueprintReadWrite)
+    // TSubclassOf<UUserWidget> GameOverWidgetClass;
+    
     UPROPERTY()
     bool bIsMultiplayer = true;
     
diff --git a/Source/TurnBasedTutorial/MyPlayerState.cpp b/Source/TurnBasedTutorial/MyPlayerState.cpp
index ca50779..240e267 100644
--- a/Source/TurnBasedTutorial/MyPlayerState.cpp
+++ b/Source/TurnBasedTutorial/MyPlayerState.cpp
@@ -1,6 +1,8 @@
 // Fill out your copyright notice in the Description page of Project Settings.
 
 #include "MyPlayerState.h"
+
+#include "GameOverWidget.h"
 #include "MyGameState.h"
 #include "Kismet/GameplayStatics.h"
 #include "Net/UnrealNetwork.h"
@@ -37,6 +39,13 @@ void AMyPlayerState::SetPlayerIndex(uint8 NewPlayerIndex) {
     PlayerIndex = NewPlayerIndex;
 }
 
+void AMyPlayerState::GameOver_Implementation(int PlayerLoseIndex) {
+    UGameOverWidget *CreatedWidget = CreateWidget<UGameOverWidget>(
+        GetWorld(), GameOverWidgetClass);
+    CreatedWidget->AddToViewport();
+    CreatedWidget->SetWidgetText(PlayerLoseIndex != PlayerIndex);
+}
+
 void AMyPlayerState::SetEnemySelection_Implementation(
     /*const TArray<AActor *> &Troopers*/) const {
     TArray<AActor *> Troopers;
diff --git a/Source/TurnBasedTutorial/MyPlayerState.h b/Source/TurnBasedTutorial/MyPlayerState.h
index 62109fa..84c4aa2 100644
--- a/Source/TurnBasedTutorial/MyPlayerState.h
+++ b/Source/TurnBasedTutorial/MyPlayerState.h
@@ -56,7 +56,13 @@ public:
     UFUNCTION(Client, Reliable)
     void SetEnemySelection(/*const TArray<AActor *> &Troopers*/) const;
 
-private:
+    UFUNCTION(Client, Reliable)
+    void GameOver(int PlayerLoseIndex);
+
+protected:
+    UPROPERTY(EditAnywhere, BlueprintReadWrite)
+    TSubclassOf<UUserWidget> GameOverWidgetClass;
+    
     UPROPERTY(Replicated)
     bool bIsSelectionInitialized = false;