At the start of the game when u get teleported turn around and go down the slope and turn left or right, there is a door walk up to it and u will see the croteam come out with big heads.
(If the door doesn't open do the weapons cheats and shoot it with a rocket launcher)to activate the cheat press the button below ESC and type please give all.
It's really funny.
We have more cheats and tips for this game here, Serious Sam cheats
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