Cheat: Modify Def Files The def files for this game can be found in “doom/base/def” Open these files in a text editor to make modifications on all of the game variables. Note: Back up your definition files in a text file. Incorrectly modifying these files can have unwanted effects on your game and without a backup you may have to reinstall the game, erasing progress.
Cheat: Spawn Power-Ups
spawn adrenaline: Type in spawn powerup_adrenaline spawn megahealth: Type in spawn powerup_megahealth spawn invisibility: Type in spawn powerup_invisibility
Hint: Security Pass. Before you fight the final boss, move to the left and find a little section you can crawl under. There is a brick that says ID. Hit this brick like you would a computer panel. It will open a secret area with a PDA. This PDA will have messages from the programmers and will give you an all access security pass.
Hint: BFG Storage Cabinet Code In Delta Labs Level 2A there is a storage cabinet with a BFG. To unlock the door, enter the code 931.
Hint: Demon E-mail Right before you leave the delta labs for the final time (just before the lift) there is an information console with the red Doom pentagram on it. Hit download and receive a funny message addressed to other demons. It's about tips to opening a portal. It discusses how fresh the virgin’s blood has to be and how big the pentagram should be.
Hint: Skip Intro There is a game bug that let's you start the first actual level with full health, armor and a shot gun. It also skips the whole introducion. Start a new game, and make a 180 degree turn and run forward. If done correctly you should fall to your death. (do you do everything a stranger tells you to?) Now say "Restart Level" and it will start you at the beginning of Mars City!