Replace the Playground Hack with a specific fix via a case that needed its own function

src/g_game.c

@@ -5130,7 +5130,7 @@ void G_EndGame(void)
 		return;
 	}
 
-	if (gametype == GT_TUTORIAL && M_GameTrulyStarted() && restoreMenu == NULL) 
+	if (gametype == GT_TUTORIAL && M_GameAboutToStart() && restoreMenu == NULL) 
 	{
 		 // Playground Hack
 		F_StartIntro();

src/k_menufunc.c

@@ -829,17 +829,10 @@ void M_StartControlPanel(void)
 
 		if (gamedata != NULL
 		&& gamedata->gonerlevel < GDGONER_OUTRO
-		&& gamestartchallenge < MAXUNLOCKABLES)
+		&& M_GameAboutToStart())
 		{
-			// See M_GameTrulyStarted
+			gamedata->gonerlevel = GDGONER_OUTRO;
-			if (
+			M_GonerBGImplyPassageOfTime();
-				gamedata->unlockpending[gamestartchallenge]
-				|| gamedata->unlocked[gamestartchallenge]
-			)
-			{
-				gamedata->gonerlevel = GDGONER_OUTRO;
-				M_GonerBGImplyPassageOfTime();
-			}
 		}
 
 		if (M_GameTrulyStarted() == false)

src/m_cond.c

@@ -3475,6 +3475,27 @@ boolean M_GameTrulyStarted(void)
 	return (gamedata->gonerlevel == GDGONER_DONE);
 }
 
+boolean M_GameAboutToStart(void)
+{
+	// Fail safe
+	if (gamedata == NULL)
+		return false;
+
+	// Not set
+	if (gamestartchallenge >= MAXUNLOCKABLES)
+		return true;
+
+	// An unfortunate sidestep, but sync is important.
+	if (netgame)
+		return true;
+
+	// Pending unlocked, but not unlocked
+	return (
+		gamedata->unlockpending[gamestartchallenge]
+		&& !gamedata->unlocked[gamestartchallenge]
+	);
+}
+
 boolean M_CheckNetUnlockByID(UINT16 unlockid)
 {
 	if (unlockid >= MAXUNLOCKABLES

src/m_cond.h

@@ -472,6 +472,7 @@ extern UINT16 gamestartchallenge;
 boolean M_CheckNetUnlockByID(UINT16 unlockid);
 boolean M_SecretUnlocked(INT32 type, boolean local);
 boolean M_GameTrulyStarted(void);
+boolean M_GameAboutToStart(void);
 boolean M_CupLocked(cupheader_t *cup);
 boolean M_CupSecondRowLocked(void);
 boolean M_MapLocked(UINT16 mapnum);

src/menus/main-1.c

@@ -101,7 +101,7 @@ void M_QuitSRB2(INT32 choice)
 
 	(void)choice;
 
-	if (M_GameTrulyStarted())
+	if (!M_GameAboutToStart() && M_GameTrulyStarted())
 	{
 		INT32 mrand = M_RandomKey(sizeof(quitsounds) / sizeof(INT32));
 		if (quitsounds[mrand])

src/menus/transient/pause-game.c

@@ -562,7 +562,7 @@ void M_EndGame(INT32 choice)
 		return;
 
 	if (M_GameTrulyStarted() == false
-	|| (gametype == GT_TUTORIAL && restoreMenu == NULL)) // Playground Hack
+	|| M_GameAboutToStart() == true) // Playground Hack
 	{
 		// No returning to the title screen.
 		M_QuitSRB2(-1);