Garry's Mod

Garry's Mod

5,947 ratings
Content Type: Addon
Addon Type: Weapon, NPC
Addon Tags: Cartoon, Fun
File Size
1.124 MB
Mar 22, 2013 @ 12:21am
Aug 15 @ 4:02pm
65 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

...or DOOM Eternal
C:\Program Files (x86)\steam\steamapps\common\Doom Eternal\base\classicwads\DOOM2.WAD

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

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

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

...or 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 (208)
Sep 14 @ 12:37pm
does freedoom work?
Mr. Zombie
Aug 14 @ 5:34pm
Does this work with H-doom
Jul 21 @ 8:32pm
So Do I Just Put All My IWads In To The garrysmod Folder?
Can Think Of A Name But Won't
< >
PoorPocketsMcNewHold 13 hours ago 
Still works great, as expected. I know how to read the description, so i know how to set it up, but maybe include Freedoom by default to fix people who can't read the description ? Just as a case of removing incorrect bad critics.
Mr. Zombie Sep 14 @ 12:34pm 
hey you know the gm-doom select map wad well i think there should be a wad selection thing that is like that so you can select wads like freedooms wad or a mod wad [example plutonia 2]
Dreamin' Sep 13 @ 3:22pm 
Hey man, sorry that you have to deal with spoiled brats who don't want to ask their parents for a $5 game (and also aren't educated on how old pc games work). I probably wouldn't play this for a normal doom experience, but I'm glad you were able to get classic DooM running in GMod. I like to see people experiment with stuff like this, but some people just don't want to appreciate that.
Keep on keepin' on, buddy.

And to those people who are angry because they need the iwads to play this:

THE GAMES *clap* *clap*
ARE 5 BUCKS *clap* *clap*
ON STEAM! * c l a p *

Final Doom is the same price as DooM/DooM II, and yet you get 2 G A M E S with it!
Drugs Sep 8 @ 7:22pm 
Also. I am not responsible for any damages you get for pirating doom. Its not my fault for informing you.
Drugs Sep 8 @ 7:21pm 
Although, If you want to throw some money to ID for, You know. Giving us the entire FPS genera. Ya know.. Hehhehehjdsgfhdfjksghldukfghstrd
Drugs Sep 8 @ 7:20pm 
Jackrhoemer, Just google "Doom2.iwad free." Theres a site called some shit like "PC GAMER." Where i got mine for GZDOOM. Of course i actually own the original doom.
Squiddy Sep 7 @ 12:03pm 
@jackrhoemer I am offended that you put coding and typing in console commands on the same level
Squiddy Sep 7 @ 12:02pm 
@KingTheBigBruv This isn't really a mod, its an experimental port of a classic game. Its more for people who already own it.
PostFixEric123 Sep 6 @ 8:02pm 
I can finally look up......
jackrhoemer Sep 6 @ 1:19pm 
bruh i just want one mod and you want me to buy many other games for it to work and also do alot of coding. bruh