Microsoft is throwing a House Party on Xbox LIVE in February plus they are bringing many new games to their Xbox 360 and Windows Phone 7 between the PC classic Torchlight in an HD remake of Beyond Good and Evil and also Hard Corps Uprising.
The announcement of the House Party promotion came as soon as the Microsoft CES keynote website with intends to kick it on February 16. Hard Corps Rising could be the first game but no schedule was handed as to if your rest are going to be released. Presumably it will likely be one or two games per week over a month-long period and include some other type of incentive to obtain all of the games like previous promotions.
These are definitely the games as outlined by a Microsoft news release.
Xbox Live Arcade:
Windows Phone 7: