Quake Arena Arcade brings the excitement of the decade's definitive competitive shooter to Xbox Live! Quake Arena Arcade allows players to battle through more than 40 Arenas in single player and Live 16 player multiplayer combat, in various modes such as DM, TDM, CTF, Tournament, Harvester and Overload.

The Mass Effect trilogy is a scifi adventure set in a vast universe filled with dangerous alien life forms and mysterious uncharted planets. In this dark second chapter, Saren’s evil army of Geth soldiers has just been defeated, and humans, who are still struggling to make their mark on the galactic stage, are now faced with an even greater peril…

Darksiders: Wrath of War is an action/adventure game that gives players the ability to experience the supernatural destructive power of WAR, one of the four horsemen of the apocalypse, as he explores a demon ravaged world -- seeking revenge and ultimate redemption with a vast array of modern and mythical weaponry.

Real Heroes: Firefighter puts players in the soon-to-be soot-stained boots of a rookie firefighter who has just been assigned to a busy metropolitan fire station. Players will undergo a “baptism of fire” in an escalating array of emergency situations.

Karaoke Revolution will let karaoke fans sing and compete against friends with expanded multiplayer modes, 50 all-new hit songs from master recordings, as well as an endless amount of customizable venue options and newly enhanced customizable characters, including dramatic facial and body morphing.

Raven Software's new sci-fi shooter Singularity is set on a small, unnamed island occupied by the Russians, Cold War tensions rise once again when a U.S. pilot discovers the horrific truth that became of experiments with element E99 in the 1950s.

Killing Floor is a first-person co-op survival horror, set in and around London after a mad scientist’s “specimens” have broken loose and gone on the rampage.

Microsoft revealed its Comic-Con International 2009 lineup, including season three of the Web series The Guild and the new show Girls Go Geek, as well as spotlight its universe of pop culture icons, from hilarious characters like Stan and Cartman of South Park, to the fearless troopers of the Halo universe and the gritty renegade spy Sam Fisher from Splinter Cell Conviction.

Offering a fun and unique new baseball experience, Baseball Blast! gives fans the opportunity to test their abilities in a variety of unique game modes, including skill challenges, puzzles, and trivia matches, as well as entertaining play-by-play commentary by popular baseball personalities.

Microsoft and Epic Games will unleash the Gears of War 2: All Fronts Collection, a value-packed compilation that combines all previous GoW 2 add-ons with brand new multiplayer and campaign content Dark Corners, which will also be available as DLC.