
We've always said that playing co-op games online is a much different social experience, compared to typical multiplayer versus play. Just hop into any versus game of Halo 3 and compare the chatter to that of a co-op game of Halo 3. It's absolute night and day. Perhaps the reason is John Gabriel's Internet Fuckwad Theory, or perhaps it's has to do with aggressive behavior trigger by the game type.
The latter theory was studied at the University of Missouri and its findings published in Evolution and Human Behavior, a popular science journal. To create this test they set up groups of players that would compete in co-op/team oriented gametypes and deathmatch gametypes both with/against friends and strangers in Unreal Tournament 2004.
Epic has announced that Unreal Tournament 3 Black will be available for free this weekend on Steam. Unreal Tournament 3 Black is the full version of UT3 along with the free Titan pack. In total you have enhancements which include new maps and environments, the Titan mutator, the Greed and Betrayal gametypes, the Stealthbender vehicle, weapons, deployables, and characters. The game also provides 50 Steamworks Achievements.
UT3 sports a single player campaign that has drop-in and drop out co-op available throughout the entire story. Up to four players can play in this mode, though it may be limited by the map.
The game is available for free right now until Sunday.
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| Game | Platform | Date |
| Serious Sam HD | 11.24.2009 | |
| Star Trek: D-A-C | 11.27.2009 | |
| GREED | 11.29.2009 | |
| Avatar | 12.01.2009 | |
| Alien Breed Evolution | 12.01.2009 | |
| Spelunker HD | 12.01.2009 | |
| Matt Hazard: Blood Bath and Beyond | 12.01.2009 | |
| Resident Evil: The Darkside Chronicles | 12.01.2009 | |
| Matt Hazard: Blood Bath and Beyond | 12.01.2009 | |
| Serious Sam HD | 12.21.2009 | |
| Guitar Hero Van Halen | 12.22.2009 | |
| Guitar Hero Van Halen | 12.22.2009 | |
| Guitar Hero Van Halen | 12.22.2009 | |
| Guitar Hero Van Halen | 12.22.2009 | |
| Mario and Sonic at the Olympic Winter Games | 12.31.2009 |
Co-Optimus Co-Op Events
Our monthly Xbox Live Co-Op Night gets you online to meet other co-op gamers. An Official Xbox Live Event!
Games for Windows Co-Op Night features monthly PC co-op gameplay. An Official GFW Event!
| Game | Platform | Added |
| Donkey Kong Country | 11.20.2009 | |
| UP | 11.20.2009 | |
| UP | 11.20.2009 | |
| UP | 11.20.2009 | |
| Diner Dash | 11.19.2009 | |
| Conflict: Vietnam | 11.18.2009 | |
| Conflict: Vietnam | 11.18.2009 | |
| Conflict: Vietnam | 11.18.2009 | |
| Conflict Global Terror | 11.18.2009 | |
| Conflict Global Terror | 11.18.2009 |
Uncharted 2: Among Thieves on Playstation 3
Call of Duty: World at War on Wii
AI War on PC
Castle Crashers on Xbox Live Arcade
Pixel Junk Monsters on Playstation Network
View the top Co-Op Games by platform including our family friendly list!
Launched January 28, 2008, Co-Optimus is a website dedicated to cooperative games. The site features a focus on co-op games through a game database, blog style commentary, and featured articles. Our goal is to bring you the most comprehensive source of co-op gaming information and to inform gamers about the co-op experience.











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