Steam is offering discounted presales of Audiosurf, an IGF-contending music game that will incorporate the soundtrack from The Orange Box:

February 11, 2008 - Audiosurf, Dylan Fitterer's innovative new title that allows gamers to "ride their music," is now available for pre-purchase via Steam.

Audiosurf on Steam will include The Orange Box soundtrack, integrated with the game to enable "Still Alive" surfing and more. In addition, Audiosurf is one of the first titles to leverage the recently announced Steamworks, offering full support for the Steam Achievements that appear on the millions of Steam Community profile pages.

The title, which is a favorite to win at this year's Independent Games Festival, will be made available for play this Friday, February 15. Those who pre-purchase prior to that time will save 10% off the regular price of $9.95.

Audiosurf is a music-adapting puzzle racer where you use your own music to create your own experience. The shape, the speed, and the mood of each ride is determined by the song you choose. You earn points for clustering together blocks of the same color on the highway, and compete with others on the internet for the high score on your favorite songs. For more information, please visit www.steamgames.com