In case you didn't know, Serious Sam: The First Encounter is being re-released this fall but the game was redone under the new Serious3 engine. Forget story, forget multiclass warfare, and mostly try to ignore the pain in your fingers from constant circle strafing and gun firing. Play it co-op with friends, lots of friends as the game's difficulty ramps up as you add more people.
http://www.gametrailers.com/player/54242.html
