Serious Sam: Siberian Mayhem

MISSION: Mission 4, Roadside Picnic
DIFFICULTY: Any
CO-OP: Unlocks, individually
METHOD: Around the halfway point of Mission 4 you'll pick up the Burner gun, otherwise known as the red laser beam of DOOOOM Shortly after turning the corner around the first train, two Draconian Burners will spawn (fat red dude, still not Mario, with a jetpack and two giant laser cannons for arms). Bring the heat with your Burner gun and this one is yours.