The Last Doom 3 Walkthrough

1. Exiting the airlock (Communications Garage) and there’s a Health Station within. Kelly calls to nag about getting the transmission out. (You have a flashlight problem for awhile.) There is supply on the floor, and around on crates. There is supply at the foot of a crate. A Cacodemon and an Imp attack. There are two vents.

FYI: If at some point you need supplies, then return to the garage, and crawl into the vent in the corner of the garage to find supply. Jump across the  gap for supply, then go down the ladder to get under the floor where there is supply. Exiting might trigger Imps.

2. Go upstairs toward the elevator. Approaching the elevator triggering another Cacodemon.
3. Call the elevator (Comm Main Elevator), then press COMMUNICATIONS.
4. Exiting the elevator (Communications Access) triggers a wall panel to drop revealing a Soldier. To one side of the elevator is a panel, with an OPEN MAINTENANCE HATCH button for you to press. This opens the door/hatch to the alcove the dead Soldier was in. The open alcove hatch is alongside the open wall panel. Approaching the alcove triggers a Zombie and Imp. In the alcove is supply.
5. Go through the red door (Skyway), to enter a windowed hallway. The lights flicker and turn off.
6. Go through the next door (Communications Lobby). There is a console protected by Soldiers. There is a little supply on the console. Security Terminal 1 has a button labeled COMMUNICATIONS LOCKED. Pressing this triggers a Cacodemon, followed by Soldiers.
7. The, now, unlocked Communications security door is around the corner from the console. On the other side (Communications Access), is a Health Station—these Health Stations are a little stingy..
8. Go through the next door (Communications Hallway). To the right, you witness Campbell blowing up the communications with his BFG).
9. Moving along the walkway triggers a Soldier at one end and a shielded Soldier at the other. There is some supply under the walkway at both ends.
10. At the end of the walkway, is another door (Communications Access).
11. Go downstairs and through the next door (Main Communication Room) and your mission is complete, for now. The equipment has been largely destroyed, so Kelly tells you to go the Satellite Control Center. On the console, there is a PDA (Seamus Blake), and supply.
12. Exit the room (Communications Access), and go back up the steps where you’re attacked by a shielded Soldier.
13. Approaching the red security door, Engineering Access, opens an alcove containing a Zombie. The alcove has supply. Taking them triggers an Imp to crowd the alcove.
14. Go through the next door (Communications Engineering Unit 1). There is a Zombie waiting for you. There is supply in the vent from whence came the Zombie.
15. Go through the next door (Comm Engineering Lift 1), to encounter an Imp and Soldiers. There is supply, triggering a soldier.
16. Call the lift. At the bottom is a fat Zombie and an Imp. In the alcove alongside the lift is supply.
17. Go through the door (Comm Engineering Unit 1), to encounter a Soldier on the walkway, and an Imp on a balcony. At the other end of the walkway, there is supply behind an equipment bay protected by a Soldier.
18. Go into the next room where there is an Imp and a fat Zombie. There is supply where the fat Zombie was. There is a Flow Terminal Control panel with a button labeled OPEN ADDITIONAL AREA VENTING which opens a vent to the right of the panel. Inside the vent is supply.
19. Exit the vent, then go down the stairs to greet one Imp after another. There is supply in the corner opposite the stairs, and behind the equipment bay.
20. Going up the stairs—you have not yet climbed—toward the red door opens an alcove and an Imp materializes. In the alcove is supply.
21. Go through the red door. In the center of the walkway, is supply that triggers an Imp.

FYI: There is a red door opposite the one you used to enter this area. In it (Comm Engineering Storage 1) is a fat Zombie and a skinny Zombie. There is supply on the floor opposite the door that triggers more Zombies. Jump on a barrel to jump onto the container to jump up onto the catwalk. There is supply on the catwalk. Go through the door to discover supply at the end of the catwalk, and the Imp(s) that attack. Backtrack down into and exit the storage room. Walk to the middle of the catwalk, then turn left.

22. Go through the door down the middle of the walkway, so an Imp can throw great balls of fire down at you from the balcony. At the end of the short walkway is an Imp with supply. Under the stairway is supply. While crawling around under the steps, a Soldier pops you one and runs.
23. Go up the stairs, and move past the machinery to go through the red door (Comm Engineering Lift 2). An equipment bay falls. You can climb onto it and walk ahead. There is a vent you can crawl in, containing supply, which trigger an Imp attack. (You pay for everything you get.)
24. Ride the lift up, to be attacked by an Imp.
25. Go through the next red door (Comm Systems), then go upstairs to engage a Soldier, and a shielded Soldier. Under both ends of the walkway is supply. Go to the end of the ramp, down the stairs, at the foot of which there is a PDA (Ben Wolfe) and supply
26. Go through the door (Comm Engineering Unit 2), to be attacked by Cacodemons and a shielded Soldier.
27. Go through the Security Unit-k8 door (Security Office), combating two Soldiers are in the office area. Open storage locker #054 (keycode 246) in which is supply. There is more on a nearby console. When you move to the main console, Kelly tells you from where the invasion is coming. There is a Sentry Deployment Control panel with a button, ACTIVATE SENTRY, for you to activate the Sentry Bot. (This walk with the bot is more dangerous than the previous walk because aliens will sometimes come from more directions than the bot can protect you. If the bot is destroyed, you can return to the security office to deploy another.)
28. Along the way, you pass through Communications Engineering Unit 2, Communications Annex, and ends at Thermal Control. At one point you find supply that triggers a Cacodemon. At another point, there is supply in a dark corner. Lastly, in Terminal Control, there is supply, and behind a crate is more. (You can backtrack later for this stuff.)
29. The bot deactivates at an elevator (Comm Maintenance Elevator). Ride it up to level 3 (Satellite Control Access), where Kelly tells you that Swann is nearby. There is a PDA (Rob Finch) on the floor outside of the elevator.
30. Go forward and through the door (Satellite Control Skyway), then through the Satellite Control door (Satellite Control Center). Mission accomplished. There is a console with an Orbital Communications Terminal panel. Press a button, any button. The coffee on the console is cold and stale but better than nothing.
31. Backtrack to the elevator (Satellite Control Skyway, Satellite Control Access, Comm Maintenance Elevator), and go down to Level 1, Maintenance.
32. Upon exiting (Communications Maintenance), you engage a Soldier and an Imp. Another Imp attacks as you move down the hall. Before the next door is supply
33. Going through the next door to find Imps on a ledge waving hankies at you.
34. Going through the door, a Soldier attacks, then an Imp makes a splashy entrance. There is a Health Station.
35. Take the elevator (Comm Maintenance Elevator) to Level 3 – Communications, then backtrack (Communications Access) where you are shot at by a Soldier (Skyway, Communications Lobby).

Enter the now unlocked transfer bay, and travel to Recycling Center 1.

ACQUIRED:
PDAs Seamus Blake, Ben Wolfe, Rob Finch CODE 246 WEAPON None