Nov 6, 2012--Valve, creators of best-selling game franchises (such as Counter-Strike and Team Fortress) and leading technologies (such as Steam and Source), today announced the launch of a limited access beta for its new Steam for Linux client.

Read the full thing here: http://store.steampowered.com/news/9289/

Links to Fedora and instructions for other distros (download is a deb) are in this Reddit thread: http://www.reddit.com/r/linux/comments/12qsdb/steam_for_linux_download/