Microsoft is throwing a House Party on Xbox LIVE in February and they're bringing quite a few new games to the two Xbox 360 and Windows Phone 7 starting from the PC classic Torchlight to a HD remake of Beyond Good and Evil together with Hard Corps Uprising.
The announcement of the House Party promotion came as soon as the Microsoft CES keynote with intends to kick rid of it on February 16. Hard Corps Rising would be the first game but no schedule was presented as to once the rest will likely be released. Presumably check here it will likely be one or two games every week over a month-long period and include some other type of incentive to get all of the games like previous promotions.
These will be the games in accordance with a Microsoft news release.
Xbox Live Arcade:
Windows Phone 7: