
You'll find one of 4 Gore Nests that we'll have to kill in this mission. Hop down the broken walkway and check the doorway to the right, and you'll find an Elite Guard. Head back up and once you've reached the other side of the destroyed walkway, grab the arm from the corpse and use it to open the door from earlier.

Check the wall to find a console that will show you whose fingerprints you need and follow it. Go through the next door and kill the Possessed in the hall, then go through the door on the right to find a panel on your left that requires some fingerprints. Go left and jump over the gap (if you fall, just get back to the main area and then come back here), then go through a door on your left to find a Field Drone and a Data Log. Head through the big door to reach the main area of the foundry. There are three health stations on the level, one with 80 health, one with 50 health, and one with 30 (in BFG Edition two have 100 health and one has 50 health).At the beginning of the mission you'll be introduced to combat rewards. There are no changes in the amount of items in the BFG Edition. The item count on Nightmare is the same as on Veteran, except the med kits are absent.

Here only number of distinct spawn points is shown. * Some of the cherubs are spawned by the arch-viles, thus their amount can vary. There are no changes in enemy amount in the BFG Edition. The enemy count on Nightmare is the same as on Veteran. The hatch can be unlocked by using one of the control panels in the same room. Found in an unlockable maintenance storage hatch in Security Monitoring. And now I will kill you." Objectives Obtain access codes Obtain access codes for Lab A Obtain replacement door panel Find replacement door panel in Lab A to gain access to Data Library The voice of Sergeant Kelly taunts the marine, saying, "I killed that pathetic bodyguard. Just outside the entrance to the Primary Server Bank, the marine runs into a wounded Campbell, who reveals that Sergeant Kelly ambushed him and took his gun, the BFG 9000, and then dies. He then returns to the entrance, fixes the security door and gains access to an elevator that leads down to the Primary Server Bank.

After obtaining the PDA from Security Monitoring and using the codes (627) to access Lab A, the marine makes his way to the upper floor and finds the replacement door panel. However, Lab A itself is locked up, so the marine must retrieve Tony Bates' PDA which contains the codes for Lab A. The replacement door panel is located at the top level of Lab A. In order to gain access to the facility's Primary Server Bank, the marine must find a replacement door panel to fix a security door near the start of the level. The effects of the twisted demonic growth in the base are evident here. The level begins with a brief cutscene showing Jack Campbell hunting for Sergeant Kelly in the CPU Complex.
