Use the indicated combination to open the corresponding cabinet or storage room.

Cabinet 001: 396

Cabinet 003: 483

Cabinet 009: 752

Cabinet 013: 586

Cabinet 017: 347

Cabinet 023: 531

Cabinet 038: 409

Cabinet 039: 102

Cabinet 047: 123

Cabinet 048: 123

Cabinet 049: 123

Cabinet 054: 246

Cabinet 054 (second): 142

Cabinet 054 (third): 631

Cabinet 063: 972

Cabinet 064: 651

Cabinet 071: 532

Cabinet 078: 364

Cabinet 079: 364

Cabinet 103: 259

Cabinet 104: 579

Cabinet 108: 847

Cabinet 112: 538

Cabinet 114: 715

Cabinet 116: 972

Cabinet 116 (second): 624

Cabinet 117: 624

Cabinet 213: 371

Cabinet 215: 298

Cabinet 317: 841

Cabinet 386: 836

Cabinet 387: 836

Cabinet 452: 571

Cabinet 666: 372

Cabinet 669: 468

Cabinet 965: 428

Cabinet 21D: 298

Martian Buddies 1 and 2: 0508

Weapons Storage 1 and 2: 584

Plasma Storage Room: 734

Double-Barrel Case: 731

Open your Steam library, Right Click "Doom 3 BFG Edition" and select "Properties". Select "Set Launch options", then enter +seta com_allowconsole 1 into the text box. This will allow you to access the console window in all three games. Press ~ to display the console window. Enter one of the following codes to activate the corresponding cheat function.

1. In Doom two numbers are required, the first with the episode number and second one for the level number, with a space between them. In Doom 2, simply enter the number of the level in two digit format.

In the final level, after opening the wall, you will have to follow hallways until reaching the Cyberdemon. Remain on your left at all times during this time to find the secret room. The room is located just before meeting the Boss. That room contains the last PDA, with words from the iD developers.

When your Soul Cube is activated, use it on the Cyberdemon. Imps and Maggots will also spawn from the center of the room, allowing the weapon to be refilled. Avoid the rockets from the Boss. Consider running around the center.

To keep a sentry bot alive, play under the Recruit difficulty setting. Kill enemies before they attack your sentry bot. Sentry bots can be found during the following levels.

• Doom 3 "EnPro Plant, Communications", where you can take a new one if your buddy is destroyed.
• RoE "Erebus - Level 6, Phobos Labs - Sector 3"
• The Lost Mission "Underground - Sector 2"