I'm looking for a game that is just there in case I get bored of what my main games are. Something like Kartrider, not necessarily a racing game, but something like it. I have both kartrider and bots. I'm not really looking for a mmorpg that you fight to level up because I currently play world of warcraft. Any suggestions? I like co-op missions the best... like you're on a team with other people doing missions or just fighting computer enemies. It could also be a mud/fps/rpg/racing/sport. Thanks a bunch.

Gunz: The Duel is pretty good to pass time.

Drift City is fun, also has a lvl up system, mission, and i think a team chase system.

Thanks for the replys fellas, but I've already played GunZ, I'm actually thinking of getting it again maybe. And Drift City, I don't know, the racing games are getting kinda boring. What about sports games? Any free MMORPG sports games? (level up, get new gear and stuff)