Microsoft is throwing a House Party on Xbox LIVE in February plus they are bringing quite a few new games to their Xbox 360 and Windows Phone 7 including the PC classic Torchlight for an HD remake of Beyond Good and Evil and also Hard Corps Uprising.
The announcement of the House Party promotion came following Microsoft CES keynote with offers to kick them back on February 16. Hard Corps Rising may be the first game but no schedule was presented as to if more info the rest is going to be released. Presumably it will likely be one or two games per week over a month-long period and include some other type of incentive to obtain all of the games like previous promotions.
These will be the games based on a Microsoft blog post.
Xbox Live Arcade:
Windows Phone 7: