OpenCoop is a cooperative multiplayer modification for Doom³.

Up to 4 Players can fight over Lan or Internet the Id Software campaing, the Addon "Ressurection Of Evil" or one of 42 custommaps as InHell or ClassicDoom for example.

You can customise you playermodel with 13 individual heads and tint your amor over a colorslider.

Every player can pick up weapons and armor once. Collected health from medpacks or heathstations goes into a heathpool, where you take HP from when respawning after dying.

The AI got tweaked to act smarter with multiply attackers and the strength scales depending on the number of players.

In "Hellwave" gametype you fight against waves of monsters on the original DM maps or on one of 3 new custommaps.

Image RSS Feed Latest Screens
Developer test, RoE intro with OC_color_skin Developer test, RoE intro with OC_color_skin Developer test, RoE intro with OC_color_skin
Blog RSS Feed Report abuse Latest News: RtH Spidermastermind alive and new oc_custom map

4 comments by Klonsemann on Mar 11th, 2010

The work on maps go on and there is a new oc_custom coming up.
Thats "Tested6.0". A first betaversion with everything ported but still without spawnprogress will be released soon.

So its again on you to report traps and bugs.

Another cool thing i was working on is animating the spidermastermind that D³ mod "Recall to Hell" build and released as free content.

Model and textutes by RtH, rig and animation by klonsemann.

User Posted Image

Till now the following animations are done, walk_forward (pic above), srafe_left, idle.

There is no concept about attacks and behavior jet.
So thats more a personal test than a preview to a release.
If this ever gets completed ingame, maps must be found where this enemy could play out its strength.

Developers talk @doom3world

Media RSS Feed Latest Video
Downloads RSS Feed Latest Downloads
InHell 1.1

InHell 1.1

Aug 26, 2008 Multiplayer Map 1 comment

InHell 1.1 for OC contains the news maps Phobos Anomaly I & II mostly bugfree and playable and of cause listed bugs from mappack2.0 bugtracker fixed...



Jul 5, 2008 Players Model 2 comments

SUBMOD: "TShirt Player Model for OpenCoop 2.0a"

3 Hellwave custommaps

3 Hellwave custommaps

Feb 24, 2008 Multiplayer Map 0 comments

Hellwave seems to hav many fans in our community. That for we modified 3 custom DM maps to run this gametype.

Make It To Morning 1-6

Make It To Morning 1-6

Feb 19, 2008 Multiplayer Map 5 comments

This Addon for OpenCoop includes the Maps 1-6 of Make It To Morning. 1. Villa 2. Castle Kalt 3. Monster Mountain 4. Tower 5. Alcatraz 6. Maggot Wood All...

OpenCoop Mappack 2.0 Expansion

OpenCoop Mappack 2.0 Expansion

May 22, 2007 Multiplayer Map 0 comments

This ZIP file contains the ClassicDoom Episode for OpenCoop.

OpenCoop Mappack 2.0

OpenCoop Mappack 2.0

May 14, 2007 Multiplayer Map 0 comments

This ZIP file contains additional custommaps for OpenCoop. InHell, Episode with 19 maps, by Doomi Final Key, Single Map, by Zombie TEH Base, Single Map...

Post comment Comments  (0 - 10 of 63)
Shrektacular Jun 28 2014, 6:02am says:

Does this mod allow the campaign to be played coop?

+1 vote     reply to comment
Benjanyan Jul 2 2014, 1:01pm replied:

Yes, although it is far from finished. Some levels are unplayable and others need some "tweaks" via the console.

+1 vote     reply to comment
Shrektacular Jul 2 2014, 8:06pm replied:

aw :C

Is the other coop mod any better?

+1 vote     reply to comment
Guest Jun 17 2014, 4:13pm says:

This comment is currently awaiting admin approval, join now to view.

Guest May 10 2014, 3:10pm says:

This comment is currently awaiting admin approval, join now to view.

Benjanyan Jul 2 2014, 12:56pm replied:

The artefact should give you a berserk powerup rather than slowing time as in single player. "Should" meaning sometimes it does! On the server side, "net_allowCheats 1" and "pm_runSpeed 400" may be useful console commands rather than just skipping the level. That's from memory, you many need to play with the run speed value.

+1 vote     reply to comment
thefirstwol Apr 24 2014, 6:53pm says:

Hello, i would say i love it but i cannot no matter what i try Open/create a fakking server, PLEASE! PLEASE! tell me how to create a server so me and my friends can enjoy the game, please, Thank you :D

+2 votes     reply to comment
Benjanyan Apr 28 2014, 7:18am replied:

Haven't played this mod in yeeeeears but I'll try and help from memory (I used to play loads and host a dedi but was a little gutted to see the website had gone).

Anywany, you should be able to load the mod from the mods menu and then create a server from the menu. If no maps show up, try changing the gametype. Once you're loaded, your friends should be able to see your server on their list. You NEED to have port 27666 UDP forwarded/mapped on your router or they'll never see your server (if you're not playing over a LAN). Have a look at if you're stuck with that.

+1 vote     reply to comment
Guest May 11 2014, 4:12pm replied:

This comment is currently awaiting admin approval, join now to view.

Cataflexia Mar 22 2014, 1:25pm says:

Hi guys!

I've a problem.

I've installed successfully:
-Doom 3
-Doom 3 RoE
-OpenCoop Alpha 2.0
-Doom 3 Patch

The Doom 3 opencoop works very fine and with my friends I've played all first campaign of Doom 3.

So, now we want to play RoE expansion. But the problem is that I don't see how to select the RoE maps on the Multiplayer Menu of OpenCoop.

So, I've tried to load a map from the console with the following command:

map game/

Then, the game begin to load and short later show me the following message:

ERROR: Function 'map_erebus1::main' not found in scritp for 'call' key on worldspawn

Anybody can help me? I've watched a lot of videos that show how all people can play RoE expansion without problems.


+2 votes     reply to comment
Benjanyan Apr 28 2014, 7:22am replied:

There was a mistake in the alpha version that stopped ROE maps working straight out the box. It didn't load ROE by default.

Create a new shortcut to doom3.exe and add "+set fs_game_base d3xp +set fs_game opencoop" without quotes to your shortcut's path. You can also edit the .bat file in Doom3/opencoop ("client.bat" was it?) to do the same.

+1 vote     reply to comment
Post a Comment
click to sign in

You are not logged in, your comment will be anonymous unless you join the community today (totally free - or sign in with your social account on the right) which we encourage all contributors to do.

2000 characters limit; HTML formatting and smileys are not supported - text only

Doom III Icon
Doom III
Send Message
Official Page
Release Date
Released Jul 24, 2007
Mod Watch
Track this mod
Community Rating



51 votes submitted.

You Say


Ratings closed.

First Person Shooter
Embed Buttons

Promote OpenCoop on your homepage or blog by selecting a button and using the embed code provided (more).

OpenCoop OpenCoop
752 of 22,803
Last Update
4 years ago
153 members