Quake Arena Arcade is now available for download exclusively on Xbox Live for the price of 1200 Microsoft Points.
Here is some information on the game:
“Quake Arena Arcade introduces the definitive, competitive first-person shooter to a new generation of gladiators. Frag up to fifteen of your friends in six game types over Xbox LIVE, including ‘Deathmatch’, ‘Capture the Flag’, and ‘Harvester’ modes. Experience QUAKE like never before with over thirty classic maps, twelve Xbox-exclusive arenas, HD and Widescreen support, and a brand new Single Player campaign.”