Microsoft is throwing a House Party on Xbox LIVE in February and they're bringing many new games to the Xbox 360 and Windows Phone 7 including the PC classic Torchlight to a 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 it well on February 16. Hard Corps Rising is definitely the first game but no schedule was handed as to if your rest will likely be released. Presumably it is going to be one or two games every week over a month-long period you need to include some other form of incentive to buy all of the games like previous promotions.
These are definitely the games in accordance with a Microsoft blog get more info post.
Xbox Live Arcade:
Windows Phone 7: