Steam (Big Picture Mode)
From TGB WIKI
Steam Ever wanted to play PC games on your HTPC besides solitaire? Well Steam Big Picture Mode has you covered. http://store.steampowered.com/bigpicture
With Steam in Big Picture mode you can launch Steam in a 10' user interface perfect for TV Gaming. You can use Media Center Studio and easily add a launcher from WMC into Steam Big Picture Mode. Use a Xbox 360 Wireless Controller for Windows and play lots of games and easily navigate the Steam Big Picture UI and play your favourite PC games on your HTPC.