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.

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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

5 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.

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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

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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

May 22, 2007 Multiplayer Map 0 comments

This ZIP file contains the ClassicDoom Episode for OpenCoop.

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 67)
Rattle189 Aug 31 2015 says:

Doom 3 OpenCoop is an excellent campaign coop mod, although largely unfinished and probably abandoned now - it still gives you a good time with your pals if you're too scared to play the campaign on single player (like me).

While the Resurrection of Evil expansion pack was recently just supported, it is still quite buggy (as the Artifact does not work) requiring you to cheat or use some exploits to pass through some of the puzzles.

OpenCoop Alpha 2.0 has still some unfixed issues and bugs but the new features like customizable heads and customizable player armour colour. When starting a server, it still gives you the message that you are playing OpenCoop Alpha 1.1 which can be bothering sometimes and might cause confusion but still it works great.

The player limit of four (4) players only is still present, even when trying to play with Resurrection of Evil loaded as it supports eight (8) players on multiplayer but I believe can be fixed through a server command (which only the server administrator can enter) si_MaxPlayers <amount of players>.

Over the years, the popularity of the mod has beginning to decline overtime as newer games take over the market and Doom 3 was forgotten by some - but not all.

If you want to play OpenCoop with a friend or two or three - get the non-Steam version of Doom 3 (the Steam version doesn't work nor the BFG Edition as it doesn't support modifications) then get LogMeIn Hamachi (unless your router supports port forwarding so you can play without a VPN software).

Not sure if you need an original and working CD key though because we haven't tried to play together yet but I'll edit this comment in the future once we do.

Have fun! (also no longer works so I don't know how we can get updates anymore D:)

+1 vote     reply to comment
lukeman3000 Jun 27 2015 says:

Hi; Whenever I click "create server", nothing seems to happen. It gives me no indication that the server has been created. What's going on?

+1 vote     reply to comment
Sharknt Mar 7 2015 says:

Works ON MAC OS X?
ANSWER me...

0 votes     reply to comment
Shrektacular Jun 28 2014 says:

Does this mod allow the campaign to be played coop?

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

aw :C

Is the other coop mod any better?

+1 vote     reply to comment
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Benjanyan Jul 2 2014 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 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 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.

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Released 2007
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