Firefall.

Firefall is a Free to play MMO First Person/ Third person Shooter.
It is soon gonna be into beta, The gameplay video Red 5 posted is this:

Firefall will be an MMO,And Red 5 stated that there will be NO monthly fees. And no buying stuff. 100% free to play.
Firefall is going into open beta some time this year.
I already signed up.
Sign up at Firefallthegame.com .
This game is a mix of Halo, Starcraft, and Borderlands imo. They combine to make the best game ever. ( i believe).
This game looks like the best yet.
Go sign up!