Note: this disables achievements on steam to enable the console of doom 3 bfg edition right click the game in your library then go to properties. Click on launch options.
2 Deaths - 1 Gun: Kill two enemies in the same room with a rocket in DOOM 3 Multiplayer. All of Us: Find the id logo secret room in DOOM 3. Berserked!: Use Berserk to kill a player in DOOM 3 Multiplayer. Big Boy: Defeat Cyberdemon boss in DOOM 3. Boomtastic: Blow up 50 barrels in the DOOM 3, RoE, or Lost Mission campaigns.
Add this command in the box: +seta comallowconsole 1 (without quotes). Then press in the game and now you can cheat. The cheats are the same as the original doom 3. God = god mode and give all= give weapons WARNING: using the command to enable cheats, this disables achievements on steam. And this will make the game no more fun to play. I suggest you to turn off the lights put the diffuculti on hard and play it with no cheats.
![Bfg Bfg](http://reviewanygame.com/content/images/products/doom-3-bfg-edition-ps3-7.jpg)
I just wanted to help you to get the cheats and yourself is the one to decided's what to do with it.