I didn't even know they had a Video Game category before now, but apparently they do. Littlebigman pointed out in the HBO forum that several voice credits are listed for Halo 2 in the Internet Movie DataBase. Steve Downes, Jen Taylor, and Pete Stacker are all back, as the Master Chief, Cortana, and Sgt. Banks, respectively. However, there are two interesting things about this entry: the listing of Robin Atkin Downes as the Prophet of Regret, and credits for music to both Marty O'Donnell and Martin O'Donnell. So apparently human cloning is possible, and being done at Bungie. World domination indeed.

Robin Downes previously played Commander Adama in a Battlestar Galactica videogame, as well as all the warriors in Gladius. Impressive.

Halo and Halo 2 are the only videogame credits for Steve Downes except for the role of Gunnar a game called Septerra Core.

Taylor, of course, has lots of credits under her belt (wait, does that Cortana outfit even have a belt?) including several Mario games (Mario Golf, Mario Tennis, Mario Party 3 and Mario Sunshine as well as several roles in No One Lives Forever 2.

And last but not least, Stacker played Griffin in Oni but between his stints for Bungie played a Mercenary in Red Faction.