Garry's Mod

Garry's Mod

5,816 ratings
Content Type: Addon
Addon Type: NPC
Addon Tags: Cartoon, Fun
Tags: misc
File Size
1.958 MB
Mar 22, 2013 @ 12:21am
May 18, 2020 @ 12:26am
63 Change Notes ( view )

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gmDoom is a partial source port of DOOM for Garry's Mod.

Please do not share download links for commercial WAD files in the comments or discussions. If you are experiencing a problem with the addon, please post in the discussion section instead of the comments. I try to respond to the issues I can, but I don't have enough time to help everyone immediately.


You must have a DOOM IWAD file in your garrysmod/garrysmod/ folder. gmDoom only needs ONE IWAD, and any extra IWAD files you install will be ignored by gmDoom. If you have installed DOOM II: Hell on Earth, Final DOOM, Master Levels for DOOM II, DOOM 3: BFG Edition, or The Ultimate DOOM through Steam, you can find your IWAD's default location below:

DOOM II: Hell on Earth
C:\Program Files (x86)\steam\steamapps\common\doom 2\base\DOOM2.WAD

Final DOOM
C:\Program Files (x86)\steam\steamapps\common\doom 2\base\TNT.WAD

Master Levels for DOOM II
C:\Program Files (x86)\steam\steamapps\common\Master Levels of Doom\doom2\DOOM2.WAD

DOOM 3: BFG Edition
C:\Program Files (x86)\steam\steamapps\common\DOOM 3 BFG Edition\base\wads\DOOM2.WAD

The Ultimate Doom (WARNING: The Ultimate DOOM does not provide all assets!)
C:\Program Files (x86)\steam\steamapps\common\ultimate doom\base\DOOM.WAD

The recommended IWAD file is DOOM2.WAD. If you do not own a DOOM IWAD, you can still use the DOOM shareware[] IWAD or the Freedoom[] IWAD. Please consult the IWAD feature chart[] to see which features your chosen IWAD provides.

Once you have found your IWAD, copy it to your garrysmod/garrysmod/ folder by following these steps:
1. Open your Steam library.
2. Right click on 'Garry's Mod' and select 'Properties'.
3. In the window that pops up, click on the 'LOCAL FILES' tab.
4. Click on the button labeled 'BROWSE LOCAL FILES...'.
5. The folder that appears should have another folder inside it named 'garrysmod'. Open it.
6. Paste your IWAD file into the 'garrysmod' folder you just opened.
7. Installation complete!

If you decided to skip the above steps and open the garrysmod/garrysmod/ folder yourself, be aware that the path moved on June 5th, 2013. Follow the above steps so you don't use an old path!


Q: Why are there pink and black boxes everywhere?!
A: You didn't install a DOOM IWAD, or you have installed it incorrectly. Please refer to the installation guide above.

Q: Some stuff is a black square for a moment! What's wrong?
A: For now, this is normal. Textures are loaded when they are needed, so the first time you spawn something it takes a moment for it to load the textures it needs. They should be fine in a few seconds.

Q: The textures were fine, but something caused them to turn into black squares again! What do I do?
A: The material system has probably reloaded. This usually occurs when you do something like changing your video settings. The textures should begin reloading automatically, so give them some time to finish.

Q: I installed an IWAD file, but gmDoom stopped working after June 5th, 2013. Why? How do I fix this?
June 5th, 2013 was the day of the SteamPipe update for Garry's Mod. There is a good chance this has changed the location of your garrysmod folder, and you may need to reinstall your IWAD. Please revisit the installation guide, which has been updated to account for this change.

Q: Why is my weapon locked up after transitioning to a new level?
A: This is an issue with the save system of Garry's Mod. I'll try to remedy this with a custom save system.

Q: Monsters don't bleed when I shoot them, and the weapons don't have the smoke impact effects. How do I fix this?
A: This is apparently caused if you have installed the M9K weapon packs. Something about it keeps gmDoom's effects from being loaded, so try disabling it for now. I'll look for some way to resolve this conflict.

Q: What is an IWAD?
A: An IWAD is a file containing all of the DOOM assets ( sprites, textures, sounds, music, maps, etc. ).

Q: Why do I have to install a stupid IWAD? Why can't you just include the assets in the addon!?
A: It's not legal for me to redistribute the game assets.

Q: Can this mod run Brutal Doom?
A: Unfortunately, it cannot. Brutal Doom is a mod for ZDoom-based engines, but gmDoom is based on the original Doom engine.

Q: Does this mod have some sort of control panel?
A: Yes! You can open the gmDoom menu with the console command "doom_cl_menu_toggle". From here, you'll be able to set various options, including which keys are used to show the menu and the automap.

Q: How do I enable the DOOM HUD?
A: You can turn the DOOM HUD on and off by using the following commands in the console:
doom_cl_hud 1
doom_cl_hud 0

Q: How do I view the automap?
A: If you have picked up the Computer Area Map item, you can use the following commands in the console to control the automap:
doom_cl_map 1
doom_cl_map 0
The automap will not appear if you have not picked up the Computer Area Map item. The first time you turn on the map during a session, it may cause your game to freeze for a short moment while it generates.

Q: I'm Hammer user, and I would like to use gmDoom entities in my map. How do I get started?
A: There's an official mapping thread pinned in the discussion forum, check it out here!

Q: How do I open the menu?
A: You can use the command "doom_cl_menu_toggle" in the console.
Popular Discussions View All (200)
Apr 2 @ 12:38pm
Does this work with H-doom
Mar 20 @ 2:49pm
[HELP] Invincible enemy's?
Mar 1 @ 10:52pm
Can there be support for Chex Quest?
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oskarabrahamsson2020 Apr 9 @ 11:10pm 
uhhh they have no texture
TheMeminator Apr 4 @ 10:51am 
I put in a DOOM2 wad and not all of the enemies are available. Help!
Your average Gnaar Mar 30 @ 2:39pm 
WhErE iS tHe IwAd
PGBRCarlJohnson Mar 28 @ 7:09am 
i cant find the map anywhere
BULLYHUNTER_ゴゴ Mar 27 @ 9:11pm 
The NPC names are broken.
phoenixpnr Mar 20 @ 3:34pm 
@mushin21 god please no
mushin21 Mar 19 @ 4:02am 
Can I use HDoom with this mod ?
onuchowski Mar 19 @ 12:46am 
i got problem with iwad to this addon
Pow! Mar 9 @ 6:58pm 
well this takes "(source)port" to a WHOLE new level