Delta Labs Level 3 South - Doom 3 Guide - IGN (2025)

Delta Labs Level 3 SouthApproach the door ahead with your shotgun ready. As soon as the door opens, you'll see a Z-SEC and he's not the only enemy to worry about. A commando zombie will follow the Z-SEC, followed by two more Z-SECs. You can take them all out safely by waiting near the doorway. When the area is clear, grab the armor and plasma cells from the dark nook to the left.

You'll have to go into the room to the right to unlock (via control panel) the door to the left. There's a bathroom to the right, and a Z-SEC inside, but nothing else other than a suit of armor and some ammo. As you go through the left door (entering the Lower Terminal Office), watch for an imp that spawns in front of you and a commando that spawns in the lower area. Grab the PDA of Frank Cerano, and then ready your weapons as you open the next door. A Z-SEC is just on the other side, and a commando zombie will jump down from an upper platform just as an imp spawns behind you.

Step into the small room across the hall to make use of the health station as needed. At the far end of the room is a control panel that will allow you to enter the teleportation chamber outside the room and to the left. As you leave the small room, look out for an imp and then step into the chamber decontamination room to the left.

Go through the door to the right, ready to kill the two imps inside. There's a pair of storage lockers, both of which can be unlocked with the code 836. There are two new doors in the room—for now, take the door to the right, but be ready to shoot down the commando zombie that attacks you. Through another door, you'll find the PDA of Han Lee, along with an imp to your left.

Backtrack a bit to the room with two lockers and enter the second doorway. As you do, a chaingun commando will appear on an upper level across the room. Take aim with your machine gun to kill it, and then head across the room to the control area. A commando zombie will rush in the room behind you, so be prepared to take him out as you activate the teleporter via the controls on the desk. You can choose between two teleporter destinations. For now, choose to teleport to the storage room and then step into the teleporter mechanism in the center of the room.

You'll immediately be attacked by an imp as you appear inside the storage room. Unlock the storage cabinet with the code 841, and then exit the storage room, turning left to return to the teleporter area (you'll run into a Z-SEC along the way). Go to the teleporter controls again and choose the balcony as your destination before stepping into the teleporter and warping upstairs.

Head forward into the Transfer Bay Access, where you'll see the level's exit to the left. Turn right to enter a small control room with an imp and then hit the control panel to unlock the transfer bay. Watch your right as you leave the room, as the wall will fall, letting out a commando zombie and a revenant. When they're dead, look behind you for a second revenant that comes from the small control room. With the area clear, exit the stage.