21x Marine-Zombies

Navigate Alpha Labs Sector 3 in Doom 3, battling Marine-Zombies and Imps. Find keycards, use a claw crane, and discover PDA information to progress.

Leave the lift and proceed through the hall, eliminating 2 Imps and 3 Marine-Zombies. Take the left path when presented with a choice. In this area, defeat the Maggot and Trites. You'll find the door here is locked and requires a keycard, so take the other path for now. Before entering the next door, defeat the Maggot and Trites. Afterward, enter the door and grab the PDA.

The PDA belongs to Mark B. Lamia, Operations Coordinator for Alpha Labs Sector 3. It contains general access security clearance and an audio log titled "Incompetent Employees." The audio log features a Russian employee complaining and provides the code 123. The PDA also contains emails from George Poota (regarding absences), Graham Fuchs (asking about storage locker codes and mentioning a late Q4 Analysis due to a party), and Dusty Welch (expressing enthusiasm for working at UAC and confirming crates were moved).

Use the panel to operate the claw crane. Your objective is to remove two barrels emitting green smoke. Lower the claw, position it over a barrel, press 'close,' then press the button in the lower left corner. Repeat for the second barrel to clear toxic gasses and receive a new objective: Locate the entrance to Alpha Labs Sector 4.

Upon leaving the room, you will encounter a Marine-Zombie. Defeat it, then enter the area where the toxic gas was. Here, you will find a keycard. Take it and enter the door.

Inside, you'll find several barrels. Proceed up the stairs and call the platform. Two Marine-Zombies will appear; shoot the barrel to eliminate them quickly. Open the cabinet using code 123. Collect the armor from the platform. Return to the previously locked door. On your way, you will face 4 Marine-Zombies. Defeat them and collect the PDA.

This PDA belongs to George Poota, who works in Waste Management in Alpha Labs Sector 3. It contains general access security clearance. The PDA includes an email from Mark Lamia reprimanding George for missing shifts and an incomplete email from martianbuddy.com.