Microsoft is throwing a House Party on Xbox LIVE in February plus they are bringing several new games to the Xbox 360 and Windows Phone 7 including the PC classic Torchlight for an HD remake of Beyond Good and Evil together with Hard Corps Uprising.
The announcement of the House Party promotion came following your Microsoft CES keynote with intentions to kick rid of it on February 16. Hard Corps Rising may be website the first game but no schedule was handed as to once the rest are going to be released. Presumably it is going to be one or two games every week over a month-long period and include some other type of incentive to acquire all of the games like previous promotions.
These are definitely the games based on a Microsoft website article.
Xbox Live Arcade:
Windows Phone 7: