Microsoft is throwing a House Party on Xbox LIVE in February and they are generally bringing quite a few new games to the Xbox 360 and Windows Phone 7 starting from the PC classic Torchlight for an HD remake of Beyond Good and Evil in addition to Hard Corps Uprising.
The announcement of the House Party promotion came as soon as the Microsoft CES keynote with promises to kick rid of it on February 16. Hard Corps Rising could be the first game but no schedule was presented as to if your rest is going to be released. check here Presumably it will likely be one or two games per week over a month-long period and include some other kind of incentive to acquire all of the games like previous promotions.
These would be the games in line with a Microsoft website article.
Xbox Live Arcade:
Windows Phone 7: