As already mentioned Serious Sam1 is pretty damn good co-op if you can look past the budget-production values, the game can get hectic, especially in the larger fields when 50+ monsters come pouring out after everyone, too bad the same cant be said for Serious Sam2, which scaled back a bit on the # of monsters on-screen at once thing....
(which I blame on the game being "ready made" for the Xbox)
(which I blame on the game being "ready made" for the Xbox)