Microsoft is throwing a House Party on Xbox LIVE in February and they're bringing numerous 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 in addition to Hard Corps Uprising.
The announcement of the House Party promotion came as soon as the Microsoft CES keynote with intentions to kick it well on February 16. Hard Corps Rising would be the first game but no more info schedule was presented as to if the rest are 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 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: