Emu-OS is a new Linux-Distro, packed with a collection of game-console emulators & an easy-to-use user interface.
It is built around the Emulation Station software & allows you to play retro games without having to install anything on your computer, because it runs from a dual-arch Live DVD, or an USB-memory stick.
Emu-OS comes packed with a great collection of emulators, supporting a wide range of systems, including Nintendo 64, Nintendo Entertainment System & Super Nintendo Entertainment System.
The ISO image contains software packages optimized for both x86 & x86_64 instruction set architectures. A game controller is required to use Emu-OS.
Head over here for more info & downloads.