Late on Friday, December 13, Valve released the first public version of SteamOS. As you would expect, SteamOS is currently very rough around the edges -- it is essentially just a version of Debian 7.1 ...
Since SteamOS was first released in December 2013, Valve has been quick to squash bugs and add much-needed functionality. It still isn't clear when Valve will launch the final version of SteamOS ...