diff --git a/src/d_main.cpp b/src/d_main.cpp
index be097ac98..301be20f8 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -128,6 +128,7 @@ void DrawHUD();
 
 // EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
 
+extern void I_SetWindowTitle(const char* caption);
 extern void ReadStatistics();
 extern void M_RestoreMode ();
 extern void M_SetDefaultMode ();
@@ -164,6 +165,7 @@ EXTERN_CVAR (Bool, lookstrafe)
 EXTERN_CVAR (Int, screenblocks)
 EXTERN_CVAR (Bool, sv_cheats)
 EXTERN_CVAR (Bool, sv_unlimited_pickup)
+EXTERN_CVAR (Bool, I_FriendlyWindowTitle)
 
 extern int testingmode;
 extern bool setmodeneeded;
@@ -2742,6 +2744,9 @@ void D_DoomMain (void)
 			setmodeneeded = false;			// This may be set to true here, but isn't needed for a restart
 		}
 
+		if (I_FriendlyWindowTitle)
+			I_SetWindowTitle(DoomStartupInfo.Name.GetChars());
+
 		D_DoomLoop ();		// this only returns if a 'restart' CCMD is given.
 		// 
 		// Clean up after a restart
@@ -2777,6 +2782,10 @@ void D_DoomMain (void)
 		FS_Close();						// destroy the global FraggleScript.
 		DeinitMenus();
 
+		// delete DoomStartupInfo data
+		DoomStartupInfo.Name = (const char*)0;
+		DoomStartupInfo.BkColor = DoomStartupInfo.FgColor = DoomStartupInfo.Type = 0;
+
 		GC::FullGC();					// clean up before taking down the object list.
 
 		// Delete the reference to the VM functions here which were deleted and will be recreated after the restart.
@@ -2896,3 +2905,12 @@ DEFINE_FIELD_X(InputEventData, event_t, data2)
 DEFINE_FIELD_X(InputEventData, event_t, data3)
 DEFINE_FIELD_X(InputEventData, event_t, x)
 DEFINE_FIELD_X(InputEventData, event_t, y)
+
+
+CUSTOM_CVAR(Bool, I_FriendlyWindowTitle, true, CVAR_GLOBALCONFIG|CVAR_ARCHIVE|CVAR_NOINITCALL)
+{
+	if (self)
+		I_SetWindowTitle(DoomStartupInfo.Name.GetChars());
+	else
+		I_SetWindowTitle(NULL);
+}
\ No newline at end of file
diff --git a/src/posix/cocoa/i_video.mm b/src/posix/cocoa/i_video.mm
index b8765c1a6..a1bc96403 100644
--- a/src/posix/cocoa/i_video.mm
+++ b/src/posix/cocoa/i_video.mm
@@ -197,9 +197,12 @@ namespace
 
 @interface CocoaWindow : NSWindow
 {
+	NSString* m_title;
 }
 
 - (BOOL)canBecomeKeyWindow;
+- (void)setTitle:(NSString*)title;
+- (void)updateTitle;
 
 @end
 
@@ -211,6 +214,23 @@ namespace
 	return true;
 }
 
+- (void)setTitle:(NSString*)title
+{
+	m_title = title;
+
+	[self updateTitle];
+}
+
+- (void)updateTitle
+{
+	if (nil == m_title)
+	{
+		m_title = [NSString stringWithFormat:@"%s %s", GAMESIG, GetVersionString()];
+	}
+
+	[super setTitle:m_title];
+}
+
 @end
 
 
@@ -271,6 +291,7 @@ public:
 	static void UseHiDPI(bool hiDPI);
 	static void SetCursor(NSCursor* cursor);
 	static void SetWindowVisible(bool visible);
+	static void SetWindowTitle(const char* title);
 
 private:
 	struct ModeIterator
@@ -717,6 +738,16 @@ void CocoaVideo::SetWindowVisible(bool visible)
 	}
 }
 
+void CocoaVideo::SetWindowTitle(const char* title)
+{
+	if (CocoaVideo* const video = GetInstance())
+	{
+		NSString* const nsTitle = nullptr == title ? nil :
+			[NSString stringWithCString:title encoding:NSISOLatin1StringEncoding];
+		[video->m_window setTitle:nsTitle];
+	}
+}
+
 
 void CocoaVideo::SetFullscreenMode(const int width, const int height)
 {
@@ -813,9 +844,7 @@ void CocoaVideo::SetMode(const int width, const int height, const bool fullscree
 
 	[[NSOpenGLContext currentContext] flushBuffer];
 
-	static NSString* const TITLE_STRING =
-	[NSString stringWithFormat:@"%s %s", GAMESIG, GetVersionString()];
-	[m_window setTitle:TITLE_STRING];
+	[m_window updateTitle];
 
 	if (![m_window isKeyWindow])
 	{
@@ -1519,3 +1548,9 @@ void I_SetMainWindowVisible(bool visible)
 {
 	CocoaVideo::SetWindowVisible(visible);
 }
+
+// each platform has its own specific version of this function.
+void I_SetWindowTitle(const char* title)
+{
+	CocoaVideo::SetWindowTitle(title);
+}
diff --git a/src/posix/sdl/sdlvideo.cpp b/src/posix/sdl/sdlvideo.cpp
index c1d830659..8cae68739 100644
--- a/src/posix/sdl/sdlvideo.cpp
+++ b/src/posix/sdl/sdlvideo.cpp
@@ -551,3 +551,18 @@ ADD_STAT (blit)
 		BlitCycles.TimeMS(), SDLFlipCycles.TimeMS());
 	return out;
 }
+
+// each platform has its own specific version of this function.
+void I_SetWindowTitle(const char* caption)
+{
+	auto Screen = static_cast<SDLFB *>(screen)->GetSDLWindow();
+	if (caption)
+		SDL_SetWindowTitle(static_cast<SDLFB *>(screen)->GetSDLWindow(), caption);
+	else
+	{
+		FString default_caption;
+		default_caption.Format(GAMESIG " %s (%s)", GetVersionString(), GetGitTime());
+		SDL_SetWindowTitle(static_cast<SDLFB *>(screen)->GetSDLWindow(), default_caption);
+	}
+}
+
diff --git a/src/win32/i_main.cpp b/src/win32/i_main.cpp
index d6d246185..019b01e7e 100644
--- a/src/win32/i_main.cpp
+++ b/src/win32/i_main.cpp
@@ -1360,3 +1360,16 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE nothing, LPSTR cmdline, int n
 	MainThread = INVALID_HANDLE_VALUE;
 	return 0;
 }
+
+// each platform has its own specific version of this function.
+void I_SetWindowTitle(const char* caption)
+{
+	if (caption)
+		SetWindowText(Window, (LPCTSTR)caption);
+	else
+	{
+		char default_caption[100];
+		mysnprintf(default_caption, countof(default_caption), "" GAMESIG " %s " X64 " (%s)", GetVersionString(), GetGitTime());
+		SetWindowText(Window, default_caption);
+	}
+}