Steam have over 2,000 games from Action to Indie and everything in-between. Enjoy exclusive deals, automatic game updates and other great perks. Meet new people, join game groups, form clans, chat in-game and more! With over 40 million potential friends (or enemies), the fun never stops.
To see all games on Linux, use this link http://store.steampowered.com/browse/linux/.
cd /tmp && wget http://media.steampowered.com/client/installer/steam.deb && sudo dpkg -i steam.deb