SteamOS


http://linux.softpedia.com/get/System/Operating-Systems/Linux-Distributions/SteamOS-103040.shtml#download
The future is here and it’s called SteamOS, a free Linux distribution built around the popular Steam gaming distribution platform and based on the powerful Debian GNU/Linux operating system. Being targeted towards the regular gaming user, the SteamOS operating system provides a gaming platform where Steam is the main software used by users to enjoy some of the best gaming experiences on Linux.

Supports both UEFI- and BIOS-based machines

The future is here and it’s called SteamOS, a free Linux distribution built around the popular Steam gaming distribution platform and based on the powerful Debian GNU/Linux operating system. Being targeted towards the regular gaming user, the SteamOS operating system provides a gaming platform where Steam is the main software used by users to enjoy some of the best gaming experiences on Linux.

Supports both UEFI- and BIOS-based machines

No one ever thought this could happen, Valve choosing Linux to build their Steam-based gaming operating system on open source technologies. However, users will also be able to run regular Linux applications inside SteamOS, thanks to its regular desktop mode powered by the GNOME desktop environment. Powered by a recent Linux kernel, SteamOS supports both UEFI- and BIOS-based machines, proprietary graphics cards, including Nvidia and ATI, as well as modern, high-end hardware components.

It can only be installed, no live mode available!