I just found out about this upcoming Mech combat FPS "Hawken"(free beta signups here).
Hawken is a mech-based first-person shooter. The game takes place in a post-apocalyptic human-colonized planet industrialized to the point of collapse, in which the hunt for resources has become a battle for survival. Four game modes are planned for release: team deathmatch, free-for-all deathmatch, "siege" and another yet-specified unique team game mode; Khang Le has said that they also want to do a co-op "Horde" game mode, resource- and time-permitting. Seven to eight unique maps have been planned for the game on release, with plans to provide additional downloadable content afterwards. There will be three different mech types: a light type, a heavy type, and an all-around type. – wikipedia
and i must have it! Wish it had a singleplayer campaign though.. but looks like it will be largely multiplayer and maybe co-op
DJ2 entertainment, an independent production company has obtained the rights for a film adaptation.
The story will follow two young pilots from separate clans pitted against one another after a devastating virus has covered most of the heavily industrialized planet surface in toxic crystal.