Steven Snow from Riot Games when asked "why co-op":

Game Name: James Cameron's Avatar: The Game Co-Op: No Multiplayer Type: On-line team deathmatch and capture the flag modes Publisher/Developer: Ubisoft (publisher) / Ubisoft Montreal (developer) Release Date: November 2009

This Thursday, September 10th, we're going to be holding an Xbox Live Co-Op night for the XBLA title Madballs in... Babo Invasion.  It's a game we reviewed pretty highly, and thanks to a unique four player co-op experience, we think it's one we need to share!  So much so that we're giving away 5 copies!

Game Name: Diablo 3 Co-Op: Yes Co-Op Type: currently 4 Player story/quest based Publisher/Developer: Activision (Publisher) / Blizzard (Developer) Release Date: Not Soon Enough (2010/2011)

One of the biggest problems with PC gaming for cooperative games is communication.  Traditionally PC games use text based communication as a standard, with voice chat as an afterthought or missing altogether.  While there's software available ilke Ventrillo and Teamspeak to assist in this, a dedicated server is still required.   

We've uploaded a handful more pictures of the show for your enjoyment.  Look for another batch of these soon!

Game Name: Muramasa: The Demon Blade Co-Op: No Co-Op Type/Multiplayer Type: N/A Publisher/Developer: Ignition Entertainment (Publisher) / Vanillaware (Developer) Release Date: Sept. 8, 2009

We broke the news last month that Relic would be unveiling their new co-op mode called The Last Stand at PAX 2009 this year.  Co-Optimus was there as Relic opened the curtains to the three player add-on for their game.  The mode can best be described as a survival mode with persistent progression and a focus on scoring for three players in co-op.

Name: Bayonetta Co-Op: No Publisher/Developer: Sega Release Date: January 2010

Game Name: League of Legends: Clash of Fates Co-Op: Yes Co-Op Type/Multiplayer Type: Competitive co-op in the vein of DotA Publisher/Developer: Riot Games Release Date: Oct. 6, 2009 We sat down yesterday with Steven Snow, Vice President of Productions for Riot Games, to talk about their free upcoming release, League of Legends: Clash of Fates.  Gamers who are familiar with the Warcraft 3 mod Defense of the Ancients: Allstars (or DotA: Allstars as it’s also known) are likely to feel right at home with Legends as it uses the same style of play.  What’s more, the designer for DotA: Allstars, Steve “Guinsoo” Feak, and the creator of the fansite that was the official support base for it, Steve “Pendragon” Mescon, are both involved with the making of this game and it definitely shows.

Name: Sony PSP Go Co-Op: N/A Publisher/Developer: Sony Release Date: October 1, 2009

Game Name: Torchlight Co-Op: No Developer: Runic Games (developer) Release Date: October 27th, 2009