Microsoft is throwing a House Party on Xbox LIVE in February and they are generally bringing several new games to the Xbox 360 and Windows Phone 7 which range from the PC classic Torchlight in an HD remake of Beyond Good and Evil along with Hard Corps Uprising.
The announcement of the House Party promotion came following the Microsoft CES keynote with intentions to website kick rid of it on February 16. Hard Corps Rising would be the first game but no schedule was presented with as to once the rest will likely be released. Presumably it will probably be one or two games each week over a month-long period you need to include some other almost incentive to get all of the games like previous promotions.
These are definitely the games in accordance with a Microsoft pr release.
Xbox Live Arcade:
Windows Phone 7: