diff --git a/binaries/data/mods/public/simulation/ai/common-api/utils.js b/binaries/data/mods/public/simulation/ai/common-api/utils.js
index 41412598a4..0bd6af631e 100644
--- a/binaries/data/mods/public/simulation/ai/common-api/utils.js
+++ b/binaries/data/mods/public/simulation/ai/common-api/utils.js
@@ -9,9 +9,9 @@ export function aiWarn(output)
 /**
  * Useful for simulating consecutive AI matches.
  */
-export function exit()
+export function exit(exitStatus)
 {
-	Engine.Exit();
+	Engine.Exit(exitStatus);
 }
 
 export function VectorDistance(a, b)
diff --git a/source/main.cpp b/source/main.cpp
index d97461d808..0d7db9a3d5 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -165,6 +165,7 @@ enum ShutdownType
 };
 
 static ShutdownType g_Shutdown = ShutdownType::None;
+static int g_ExitStatus{EXIT_SUCCESS};
 
 // to avoid redundant and/or recursive resizing, we save the new
 // size after VIDEORESIZE messages and only update the video mode
@@ -181,9 +182,10 @@ bool IsQuitRequested()
 	return g_Shutdown == ShutdownType::Quit;
 }
 
-void QuitEngine()
+void QuitEngine(int exitStatus)
 {
 	g_Shutdown = ShutdownType::Quit;
+	g_ExitStatus = exitStatus;
 }
 
 void RestartEngine()
@@ -209,7 +211,7 @@ static InReaction MainInputHandler(const SDL_Event_* ev)
 		break;
 
 	case SDL_QUIT:
-		QuitEngine();
+		QuitEngine(EXIT_SUCCESS);
 		break;
 
 	case SDL_DROPFILE:
@@ -235,7 +237,7 @@ static InReaction MainInputHandler(const SDL_Event_* ev)
 		std::string hotkey = static_cast<const char*>(ev->ev.user.data1);
 		if (hotkey == "exit")
 		{
-			QuitEngine();
+			QuitEngine(EXIT_SUCCESS);
 			return IN_HANDLED;
 		}
 		else if (hotkey == "screenshot")
@@ -512,7 +514,7 @@ static void NonVisualFrame()
 	g_Profiler.Frame();
 
 	if (g_Game->IsGameFinished())
-		QuitEngine();
+		QuitEngine(EXIT_SUCCESS);
 }
 
 static void MainControllerInit()
@@ -832,7 +834,6 @@ int main(int argc, char* argv[])
 
 	EarlyInit();	// must come at beginning of main
 
-	int returnValue{EXIT_SUCCESS};
 	try
 	{
 		// static_cast is ok, argc is never negative.
@@ -840,7 +841,7 @@ int main(int argc, char* argv[])
 	}
 	catch (const RL::SetupError&)
 	{
-		returnValue = EXIT_FAILURE;
+		g_ExitStatus = EXIT_FAILURE;
 	}
 
 	// Shut down profiler initialised by EarlyInit
@@ -854,5 +855,5 @@ int main(int argc, char* argv[])
 	wutil_Shutdown();
 #endif
 
-	return returnValue;
+	return g_ExitStatus;
 }
diff --git a/source/ps/scripting/JSInterface_Main.cpp b/source/ps/scripting/JSInterface_Main.cpp
index 7ca36dc9e1..d6a5fa5e2e 100644
--- a/source/ps/scripting/JSInterface_Main.cpp
+++ b/source/ps/scripting/JSInterface_Main.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2025 Wildfire Games.
+/* Copyright (C) 2026 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -47,6 +47,8 @@
 
 class ScriptInterface;
 
+extern void QuitEngine(int exitStatus);
+
 namespace JSI_Main
 {
 bool AtlasIsAvailable()
@@ -134,6 +136,7 @@ std::string CalculateMD5(const std::string& input)
 
 void RegisterScriptFunctions(const ScriptRequest& rq)
 {
+	ScriptFunction::Register<&QuitEngine>(rq, "Exit");
 	ScriptFunction::Register<&AtlasIsAvailable>(rq, "AtlasIsAvailable");
 	ScriptFunction::Register<&IsAtlasRunning>(rq, "IsAtlasRunning");
 	ScriptFunction::Register<&OpenURL>(rq, "OpenURL");
diff --git a/source/ps/tests/stub_impl_hack.h b/source/ps/tests/stub_impl_hack.h
index a54ccbfefe..f956974ad6 100644
--- a/source/ps/tests/stub_impl_hack.h
+++ b/source/ps/tests/stub_impl_hack.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2026 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -25,7 +25,7 @@ bool IsQuitRequested()
 	return false;
 }
 
-void QuitEngine()
+void QuitEngine(int)
 {
 }
 
diff --git a/source/simulation2/components/CCmpAIManager.cpp b/source/simulation2/components/CCmpAIManager.cpp
index 5e285a00eb..1cc2b51642 100644
--- a/source/simulation2/components/CCmpAIManager.cpp
+++ b/source/simulation2/components/CCmpAIManager.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2025 Wildfire Games.
+/* Copyright (C) 2026 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -87,7 +87,7 @@
 #include <utility>
 #include <vector>
 
-extern void QuitEngine();
+extern void QuitEngine(int exitStatus);
 
 /**
  * @file