BRINK

Released on May 10, 2011 by Bethesda Softworks

Developed by Splash Damage

You decide the combat role you want to assume in the world of Brink as you fight to save yourself and mankind’s last refuge!

Brink didn't get great reviews when it launched or garner much praise but today it went free to play on Steam. If you are looking for a free multiplayer shooter to play that offers interesting character customization, parkour gameplay mechanics and a bit more... the price is right. If you want you can still pickup the games DLC but the base game is entirely free and right now there are quite a few people playing it on Steam so if you do try it out, you won't be the only one playing.

http://store.steampowered.com/app/22350/BRINK/