Microsoft is throwing a House Party on Xbox LIVE in February and they're bringing several new games to both Xbox 360 and Windows Phone 7 which range from the PC classic Torchlight with 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 kick it well on February 16. Hard Corps Rising is definitely the first game but no schedule was presented with as to once the rest here are going to be released. Presumably it will probably be one or two games each 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 as outlined by a Microsoft pr release.
Xbox Live Arcade:
Windows Phone 7: