SteamOS, Valve's Linux-based OS, was recently released today for download. According to Valve, version 1.0 (called Alchemist) is built off from Debian 7.1. You can grab it from here, with Installation Instructions and info here. News Source EDIT: Do note that the current download site is featuring some failures, but the folks at SteamDB have provided an "unofficial" torrent file which is available here EDIT2: You should also note that AMD and Intel Graphics cards ARE NOT currently supported, Valve is working to fix this as soon as possible. Again, ONLY NVIDIA GPUs are supported.