Microsoft is throwing a House Party on Xbox LIVE in February and they're bringing quite a few new games to both Xbox 360 and Windows Phone 7 starting from the PC classic Torchlight in an HD remake of Beyond Good and Evil together with Hard Corps Uprising.
The announcement of the House Party promotion came following your Microsoft CES keynote with offers to kick rid of it on February 16. Hard Corps Rising is definitely the first game but no schedule was presented as to once the rest is going to be released. Presumably it will probably be one or two games per week over a month-long period you need to include some other kind of incentive to buy all of the games like previous promotions.
These would be the games based on a get more info Microsoft pr release.
Xbox Live Arcade:
Windows Phone 7: