After a lengthy beta period, Valve has finally launched Steam for Linux officially. The client can be downloaded here. To coincide with the official launch of the service, all Linux games sold through Steam have been discounted, including Serious Sam 3: BFE, World of Goo, FTL, Trine 2, Bastion, Amnesia: The Dark Descent, and more. Who knew Linux had so many games?

The sale runs until Wednesday, February 21, so feel free to peruse the shop at your leisure. And note: all games on Steam take advantage of "Steam Play," which means single purchases can be played across multiple OSes--Linux, Mac, and Windows. That means anyone can take advantage of the discounted prices.

Of course, given the numerous distributions of Linux available, Valve does note a preference. "For the best experience, run Steam for Linux on Ubuntu 12.04 using an NVIDIA GPU and drivers from NVIDIA," the company told us.