Doom 3 Walkthrough - Primary Excavation Site

Doom 3 Walkthrough Screenshot 1. The lift is surrounded by supplies. Before heading through the archway ahead, pick up everything you can, including cells, a BFG 9000, bullets, armor, rockets and grenades.

Doom 3 Walkthrough Screenshot 2. Don't miss these medkits either. You can climb the scaffolding to reach the top shelf.

Doom 3 Walkthrough Screenshot 3. Descend the stairs and find more medkits here. Watch the video to learn about the excavation site.

Doom 3 Walkthrough Screenshot 4. Approach the backpack behind the sarcophagus and the wall breaks apart. The backpack holds a BFG cell, plasma cells and bullets.

Doom 3 Walkthrough Screenshot 5. Follow the cavern, then this wall opens as you approach.

Doom 3 Walkthrough Screenshot 6. That's just not right. The wall closes behind you and the floor descends like an elevator. No turning back now.

Doom 3 Walkthrough Screenshot 7. Follow the twisting cavern. When you see these red stones, turn left.

Doom 3 Walkthrough Screenshot 8. Time for an easter egg. Press this stone with the id logo.

Doom 3 Walkthrough Screenshot 9. A wall panel slides open to your left, revealing this secret room.

Doom 3 Walkthrough Screenshot 10. Grab the id Software PDA from the center of the pentacle.

Doom 3 Walkthrough Screenshot 11. The PDA holds heartwarming messages from the dev team.

Doom 3 Walkthrough Screenshot 12. Backtrack to where you turned left a moment ago. This time turn right.

Doom 3 Walkthrough Screenshot 13. The wall before you crumbles, and a cutscene introduces Doom 3's final boss...

Doom 3 Walkthrough Screenshot 14. The Cyberdemon. Yikes!

Doom 3 Walkthrough Screenshot 15. Needless to say he's huge, and you want to keep your distance.

Doom 3 Walkthrough Screenshot 16. The arena is a large circular area where minions emerge from this center pit.

Doom 3 Walkthrough Screenshot 17. The Cyberdemon will only fall to the Soul Cube. Remember your Soul Cube is available every five frags and will replenish your health.

Doom 3 Walkthrough Screenshot 18. Focus on defeating the many Maggots and Imps to recharge your Soul Cube, then unleash it on the Cyberdemon.

Doom 3 Walkthrough Screenshot 19. Keep backing up, running around the circle of the arena as you fire at the Cyberdemon's minions.

Doom 3 Walkthrough Screenshot 20. In addition to running backwards, changing weapons and firing at the Wraiths, Imps and the Cyberdemon, you'll have to dodge the Cyberdemon's missiles as seen here.

Doom 3 Walkthrough Screenshot 21. Scarce supplies can be found, such as this medkit and armor.

Doom 3 Walkthrough Screenshot 22. More armor can be found here.

Doom 3 Walkthrough Screenshot 23. This is a tough battle for sure, but the Cyberdemon will eventually succumb to your Soul Cube.

Doom 3 Walkthrough Screenshot 24. Blood-splattered and beaten, the Cyberdemon falls.

Doom 3 Walkthrough Screenshot 25. Victory!

Doom 3 Walkthrough Screenshot 26. The final cutscene plays. The Marines arrive from earth and you are rescued. Swann is dead. But what of Betruger?

Doom 3 Walkthrough Screenshot 27. He's living as a tongue inside a large flying demon-beast thing.

Doom 3 Walkthrough Screenshot 28. Is he the beast itself, or just its tongue? Is he happy with this arrangement? It's all a mystery and the boards are abuzz.

Doom 3 Walkthrough Screenshot 29. Lastly, the end credits. Game over.