Final DOOM

Final DOOM

30 ratings
Fix for map 31 of TNT Evilution
By SSGmaster
Did you know? The Yellow key in Map 31 of TNT Evilution is missing. Don't worry it's easy to fix.

Where is that damn yellow key?!
Actually, there is a yellow key in MAP 31 of TNT but, it's tagged multiplayer only so if you don't play in multiplayer, there is no way to get the yellow key.
You can finish the level without that key but you can't get everything and kill everything without that key and without cheating.

So, if you want to do this level properly, I have a fix for you.
How to fix Map 31
It's really simple, just follow this:

  • First, go to /idgames[] and download ""
  • Once you have downloaded and unziped this file, you should have "tnt31.wad" . Copy this file, go to ...\Steam\SteamApps\common\Final Doom\base and paste "tnt31.wad" .

You have the fix on the right folder but it doesn't work yet because when you launch the game, it only launch "tnt.wad" . You must modify some files:

1) If you use the classic controls:
If you use the classic controls, you must modify "tnt.conf" . open this file with notepad, go to the bottom and add tnt31.wad after tnt.wad .

2) If you use the modified controls:
This time, you must modify "tntm.conf" . open it with notepad, go to the bottom and add tnt31.wad between tnt.wad and -config .

Now you are ready to go! Don't worry you can edit both of the files it doesn't matter.
If the fix work properly, you should find the yellow key here:

It's my first guide on Steam so I hope I was clear enough. Have fun :) !

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Zappafur Oct 15, 2017 @ 12:59pm 
From a personal standpoint, this error's a bit easier to fix if you load the map in Doom Builder 2 / GZDoom Builder and un-check the yellow key's "multiplayer only" flag.
SSGmaster  [author] Feb 11, 2017 @ 3:05pm 
I always take the germany mirror because it's the closest to where I live but I never tried the others so I don't know if there is bad mirrors.
xXx_Mason_xXx Feb 11, 2017 @ 2:13pm 
That's what I clicked. Does it matter which one?
SSGmaster  [author] Feb 11, 2017 @ 1:56pm 
You download the zip from the download mirrors list on the right.
xXx_Mason_xXx Feb 11, 2017 @ 12:49pm 
I went to /idgames. Now how do I download the .zip file? I could only find a .exe file.
SSGmaster  [author] Feb 11, 2017 @ 12:11pm 
The file you download is a .zip, not a .exe and downloads from /idgames are safe.
xXx_Mason_xXx Feb 11, 2017 @ 11:20am 
Norton says tnt31fix.exe is not safe. Is this true?
Xelaxon Oct 3, 2016 @ 2:16pm 
I didn't have to restart when I installed it, you just need to start at map 15.
SSGmaster  [author] Oct 3, 2016 @ 1:03pm 
If you save in the level you want to fix before fixing it I'm pretty sure it doesn't work but one level before, I don't know. There is one way to find out I guess (you can IDDQD if you want to quickly check before doing map 15 and 31 legit)
Cy Oct 3, 2016 @ 1:00pm 
Are saved games compatable with the fix? I saved in map 15. Can I keep my map15 save, apply the patch, than load my save, go to the secret exit to reach map31, and it'll run the fixed version with the yellow keycard, or do I have to start over from the beginning?