Steam is Currently Available for Linux
Valve announced the release of thier Steam for Linux client on February 14, 2013. Over 50 Linux game are currently 50-75% off until Wednesday, February 21, 2013 at 10:00 AM PST. The Steam client maybe be downloaded at no charge. Gamers may obtain it from the Ubuntu Software Center. For a while players would play a game on Linux will receive a free in-game item: Tux: The Linux Mascot. Team Fortress 2 is also currently available for Steam for Linux. Other Valve games currently available on Steam for Linux are: Half-Life, Counter-Strike 1.6, and Counter-Strike: Source.
"The introduction of Steam to Ubuntu demonstrates growing demand for open systems from gamers and game developers," said David Pitkin, Director of Consumer Applications at Canonical. "We expect a growing number of game developers to include Ubuntu among their target platforms. We're looking forward to seeing AAA games developed with Ubuntu in mind as part of a multi-platform day and date release on Steam."
"We're huge fans of Linux. It's like the indie OS-a perfect home for our indie game," said Alen Ladavac, CTO of Croteam, creator of the Serious Sam franchise of games. "And who better to lead the charge into Linux gaming than Valve? With Steam distribution on Windows, Mac OS, and now Linux, plus the buy-once, play-anywhere promise of Steam Play, our games are available to everyone, regardless what type of computer they're running. That's huge."