QUOTE:
For a limited time, Bioshock and Enemy Territory: Quake Wars are available via Steam at a 20% discount off their regular price. That means you can get these games for $39.95 instead of their usual $49.95 price. These two new action releases from 2K and Activision may be purchased from Steam at this special price through Monday, November 26th at 10 am PST. For more information, visit www.steamgames.com.

http://www.game-spectrum.com/index.php/PC/Bioshock-and-Enemy-Territory-20-Off-On-Steam.html