You can download SteamOS right now
As promised, Valve has made its SteamOS available to all — and barring server issues, you can download it right now. The Linux-based operating system weighs in at 960MB, and will be used to power the company's Steam Machines game platform.
Valve SteamOS beta now available for the bravePCWorld (blog)
Valve releases SteamOSOS News
Steam OS available for download, based on Debian 7.1 not UbuntuMuktware
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