Hold down the trigger. Run backward. Repeat.
That’s the Serious Sam 3: BFE strategy guide, straight from Croteam. Read it. Memorize it. Implement it. For those of you that haven’t played a Serious Sam game before, they are absolutely old school in their design. Sam can carry every weapon he finds, lug around ridiculous amounts of ammunition and mow down thousands of enemies without breaking a sweat.