Valve Releases Debian-Based SteamOS Beta
An anonymous reader writes that, as promised, "Valve has put out their first SteamOS Linux operating system beta. SteamOS 1.0 'Alchemist' Beta is forked from Debian Wheezy and features its own graphics compositor along with other changes. Right now SteamOS 1.0 is only compatible with NVIDIA graphics cards and uses NVIDIA's closed-source Linux driver. SteamOS can be downloaded from here, but the server seems to be offline under the pressure."
An alternate submission links to another article about the use of a Debian base system as well as an unofficial torrent.
Son of a Bitch. They do say it's required in the FAQ. It appears they are using it to simplify the boot from USB installation process based on the FAQ. I'd imagine if your board supports booting from USB you are probably ok but they may have hardwired support for UEFI in the installer (such that it will only look for UEFI instances for installation media) so you won't know till you try.
My bad for misleading you.