Bring the console up with [~] and type the following codes in to blow the monsters back to hell:)
aviDemo = Saves a demo of your playing to an AVI movie file benchmark = Game Benchmark doomhell = Skip all levels to last freeze = Freeze all on screen gfxinfo = Graphicscard infomation god = God mode noclip = No Clip notarget = Invisibility to most enemies com_drawfps 1 = Show FPS give all = Full load of weapons and ammo give doom95 = Load the '95 version of Doom give keys = Acquire all the keys you'll ever need give weapon_machinegun = Machinegun give weapon_shotgun = Shotgun give weapon_plasmagun = Plasmagun give weapon_bfg = BFG give weapon_chainsaw = Chainsaw give weapon_rocketlauncher = Rocket Launcher status = Your game status quit = Quid aka Exit
