Microsoft is throwing the Xbox Live Arcade House Party 2012 on February 15 to celebrate the release of four highly anticipated downloadable titles including Alan Wake's American Nightmare, I Am Alive, Nexuiz and Warp. One of these games will be released every Wednesday for four straight weeks. Plus, if you buy all four House Party games you'll get 800 Microsoft Points delivered directly to your Xbox Live account. Check out this video featuring all four games.

After the break you'll find a description of each game so that you know which to save for.

Alan Wake's American Nightmare
A thrilling new storyline, hordes of creepy enemies, serious firepower and beautiful Arizona locations, make this a must for Alan Wake veterans and players new to the series. Fight to stop your murderous evil double to take back your life … and change reality itself.

I Am Alive
In this post-apocalyptic adventure, survive the suffocating, murky streets covered in dust and search for your lost wife and daughter amidst the crumbling ruins of a once-thriving metropolis filled with distrustful survivors, dangerous armed gangs, and victims in need.

Nexuiz
Episodes of lethal combat are broadcast throughout the galaxy as entertainment in a spectacle known as The Nexuiz Competition. Jump into an arena-based first person shooter where you can alter the rules of the match and laws of physics while dominating opponents in ever-changing hostile environments.
Nexuiz

Warp
Zero, a loveable-yet-lethal orange alien with a big score to settle, has been captured by the villainous Commander and imprisoned in his underwater facility. Zero must plan his ultimate escape using his arsenal of alien abilities -- warp, frag, echo, swap and launch.

For more information on the House Party check out the Xbox Live House Party 2012 website.