Microsoft is throwing a House Party on Xbox LIVE in February and they are generally bringing several new games to the two Xbox 360 and Windows Phone 7 including the PC classic Torchlight for an HD remake of Beyond Good and Evil and also Hard Corps Uprising.
The announcement of the House Party promotion came following the Microsoft CES keynote with intentions to kick it on February 16. Hard Corps Rising may be the first game but no schedule was handed as to in the event the rest will probably be released. Presumably it bola are going to be one or two games weekly over a month-long period and include some other form of incentive to get all of the games like previous promotions.
These are definitely the games as outlined by a Microsoft blog post.
Xbox Live Arcade:
Windows Phone 7: