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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RtH Spidermastermind alive and new oc_custom map

RtH Spidermastermind alive and new oc_custom map

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The work on maps go on and there is a new oc_custom coming up...

SubMod Release "TShirt Player Model for OC2.0a"

SubMod Release "TShirt Player Model for OC2.0a"

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SubMod Release "TShirt Player Model for OC2.0a"

Make It To Morning 1-6

Make It To Morning 1-6

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Make It To Morning 1-6 for OpenCoop

Hellknight Headhunter

Hellknight Headhunter

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new Hellknight attack "Headhunter"

OpenCoop gets new playermodel

OpenCoop gets new playermodel

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New playermodel for Doom² OpenCoop mod. Of cause it has OC colorskin and you can attach all heads.

New hellwave maps and playermodel

New hellwave maps and playermodel

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Hellwave seems to hav many fans in our community. That for we modified some custom DM maps to run this gametype. The new maps are : "ViaVGA" by Borg...

OpenCoop 2.0 Alpha finished and uploading

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We finally got it. The new version is done. First of all I like the thank Klonsemann for is longterm pain-in-the-ass bugfixing of all these ugly build...

OpenCoop RoE Version send to Klonsemann

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Wow, we actually had the chance talking together via internet and coordinating ourselfs. So Klonsemann has the latest version of OpenCoop RoE and will...

First internal RoE Version running!

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Hi, I just got a first version of RoE runing. The first map loads correctly and the intro displays correctly. The RoE "Lost Souls" are working...

Smalls steps make the move.

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Last week I started porting ROE code to OpenCoop. To get into development again, I removed some testing stuff of the current version and documented/cleaned...

Thanks to Brend Kreimeier OpenCoop resurrects the evil!

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We are happy to anounce that Brend Kreimeier has donated two ROE versions for the development of an OpenCoop version of the expansion pack. A big thx...

29 maps ready for download!

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Yeah, that's right. 29 maps were compiled together to our first OpenCoop Mappack. First of all I would like to thank the mapauthors who contributed...

Working on network stuff again...

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Looks like the next version will have some new network code AGAIN. With every new version the mod is getting smoother and smoother. Currently we have...

How do you like the new version ? Having fun ?

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Hi, we are pretty happy about the current release. So hopefully you are as well. After relaxing a bit and having fun with the current release we are now...

OpenCoop 1.1 released!

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YEAH, it's done. The next OpenCoop version is ready for the public. We have a big set of new features for you which are listed in forums on as well...

Revealing the new gametype!

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I am happy to anounce that the new gamemode of OpenCoop has been successfully implemented. So how does it work? Formerly a player which died , was able...