Microsoft is throwing a House Party on Xbox LIVE in February and perhaps they are bringing several new games to the two Xbox 360 and Windows Phone 7 between the PC classic Torchlight for an HD remake of Beyond Good and Evil along with Hard Corps Uprising.
The announcement of the House Party promotion came as soon as the Microsoft CES keynote with offers to kick it well on February 16. Hard Corps Rising may be the first game but no schedule was presented with as to if your rest are going to be released. Presumably it are going to be one or two games weekly over a month-long period you need to include some other form of incentive to acquire all of the games like previous promotions.
These are definitely the games in line with a Microsoft blog post.
Xbox Live Arcade:
Windows Phone more info 7: