Microsoft is throwing a House Party on Xbox LIVE in February and they are generally bringing many new games to the Xbox 360 and Windows Phone 7 which range from the PC classic Torchlight in an HD remake of Beyond Good and Evil along with Hard Corps Uprising.
The announcement of the House Party promotion came following the Microsoft CES keynote with intentions to kick it well on February 16. Hard Corps Rising is definitely the first game more info 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 include the games based on a Microsoft website article.
Xbox Live Arcade:
Windows Phone 7: