Microsoft is throwing a House Party on Xbox LIVE in February and they are generally bringing many new games to their Xbox 360 and Windows Phone 7 which range from the PC classic Torchlight to a 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 intentions to kick it well on February 16. Hard Corps Rising could be the first game but no schedule was handed as to if the rest will probably be released. Presumably it will likely be one or two games every week over a month-long period you need to include some other type of incentive to buy all of the games like previous promotions.
These would be the games in line with a Microsoft website article.
Xbox Live Arcade: website
Windows Phone 7: