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@@ -31,6 +31,29 @@ upgrade.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+== Game exits in demo loop when playing Final Doom ==
+
+When playing with the Final Doom IWAD files (tnt.wad, plutonia.wad),
+if you leave the game at the title screen to play through the demo
+loop, it will eventually exit with the following error message:
+
+ W_GetNumForName: demo4 not found!
+
+This is the same behavior as the Vanilla executables that were
+bundled with Final Doom. When Ultimate Doom was developed, a fourth
+demo was added to the demo loop, and this change was retained in the
+Final Doom version of the executable. However, the Final Doom IWADs
+do not include a fourth demo, so the game crashes.
+
+One way to work around this problem is to make the game emulate the
+original (pre-Ultimate Doom) v1.9 executable. To do this, add the
+command line argument "-gameversion 1.9" when running the game.
+However, be aware this version does have some subtle differences that
+will affect the playback of Final Doom demos (lost soul bouncing,
+teleport behavior).
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
== Game exits when accessing the options menu ==
The game may exit with the message "Bad V_DrawPatch" when accessing