No FPS's yet? Unreal Tournament 3 on insane without glitching or Co-op on the 360. It's relatively easy until you get to the capture the flag levels. Your teammates can neither defend nor attack properly and the enemies do double damage, have double health and near perfect accuracy as well as the ability to cheat by choosing their spawns. Getting the flag means you will have to fight upwards of 10 enemies to escape because of their cheating letting them instantly respawn ahead of you when you kill them, and if you get back to your half where they aren't allowed to spawn, they use the translocator (teleport gun) to catch up to you in about ten seconds. If you survive, the enemy probably have your flag by now, in which case you're doomed. If they didn't grab the flag and you're still alive, congratulations! Now you have to do that 3 times while your teammates either:
A: Run in and die (Attack order)
B: Sit around eating all the pies before giving the enemy the flag (Defence order)
C: Get in the way and do nothing helpful (Follow me order)
D: Wander around aimlessly (Any other orders)
Oh, and this starts at level 3 of 41