Activate the following cheats by entering the corresponding codes:
CHEAT FUNCTION - CHEAT CODE Invincibility - imgodnow Doom enemies - iddqd or idkfa Upside down screen - rambo Turn into small enemy insect - toosmallforvictory Turn into TV Man character - tvman Additional grenades - bombthebass Mega-bomb - kaboom Get best guns - notimetodie Bullets more effective - arnie Throw mega-bomb - clrsrc
