Doom 3 Walkthrough Monorail

September 12, 2016 (Last Updated: ) | Reading Time: 5 minutes

This Doom 3 walkthrough is divided into 27 total pages.

You can jump to nearby pages of the game using the links above.

Monorail

Doom 3 Walkthrough - Doom 3 682
Doom 3 Walkthrough - Doom 3 682

To your right is health and ammo. Read Harding's PDA for some background.

Doom 3 Walkthrough - Doom 3 683
Doom 3 Walkthrough - Doom 3 683

Step onto the train.

Doom 3 Walkthrough - Doom 3 684
Doom 3 Walkthrough - Doom 3 684

Use this console and the train embarks.

Doom 3 Walkthrough - Doom 3 685
Doom 3 Walkthrough - Doom 3 685

Take some time to enjoy the view.

Doom 3 Walkthrough - Doom 3 686
Doom 3 Walkthrough - Doom 3 686

You discover another passenger on board. Talk to Ryan for some background.

Doom 3 Walkthrough - Doom 3 687
Doom 3 Walkthrough - Doom 3 687

Your destination nears as you round this last bend.

Doom 3 Walkthrough - Doom 3 688
Doom 3 Walkthrough - Doom 3 688

The train finally comes to a rest and your objectives are updated.

Doom 3 Walkthrough - Doom 3 689
Doom 3 Walkthrough - Doom 3 689

Step off the train and descend one of these ladders at either end of the train.

Doom 3 Walkthrough - Doom 3 690
Doom 3 Walkthrough - Doom 3 690

Below you'll find a medkit, an armor vest and clips.

Doom 3 Walkthrough - Doom 3 691
Doom 3 Walkthrough - Doom 3 691

Return above and find a medkit and a machine gun here. Ready your chainsaw before opening the door ahead.

Doom 3 Walkthrough - Doom 3 692
Doom 3 Walkthrough - Doom 3 692

Yowza! This variety of commando zombie has a whip for an arm and is exceptionally aggressive. Here I'm throwing a grenade his way but I found the chainsaw to be a better choice.

Doom 3 Walkthrough - Doom 3 693
Doom 3 Walkthrough - Doom 3 693

Your reception here is less-than welcoming. A Z-Sector is right behind the commando, and more are here to the right. Don't descend these stairs just yet.

Doom 3 Walkthrough - Doom 3 694
Doom 3 Walkthrough - Doom 3 694

This medkit can be found to the left.

Doom 3 Walkthrough - Doom 3 695
Doom 3 Walkthrough - Doom 3 695

Continue to the overlook on the left.

Doom 3 Walkthrough - Doom 3 696
Doom 3 Walkthrough - Doom 3 696

A pair of Z-Sectors are around the corner.

Doom 3 Walkthrough - Doom 3 697
Doom 3 Walkthrough - Doom 3 697

This commando attacks from behind.

Doom 3 Walkthrough - Doom 3 698
Doom 3 Walkthrough - Doom 3 698

And then another attacks from the front. Whew!

Doom 3 Walkthrough - Doom 3 699
Doom 3 Walkthrough - Doom 3 699

If you backtrack to the train area for supplies, you'll be attacked by Trites.

Doom 3 Walkthrough - Doom 3 700
Doom 3 Walkthrough - Doom 3 700

Descend these stairs you bypassed a moment ago. Grab Gary Ross' PDA to update your security clearance and learn the junction 5, site 2 airlock code 826. Clips are to the right of the boxes.

Doom 3 Walkthrough - Doom 3 701
Doom 3 Walkthrough - Doom 3 701

Search farther ahead and to the right to find this medkit and armor.

Doom 3 Walkthrough - Doom 3 702
Doom 3 Walkthrough - Doom 3 702

Continue through this large open area to battle a Z-Sector and spawn more Imps. Find a medkit and armor here. An armor vest is on the nearby shelves.

Doom 3 Walkthrough - Doom 3 703
Doom 3 Walkthrough - Doom 3 703

Climb the stairs to this second overlook and two Imps spawn. Quickly toss a grenade at each.

Doom 3 Walkthrough - Doom 3 704
Doom 3 Walkthrough - Doom 3 704

Another Imp and this commando spawn. Before ascending those stairs ahead search beneath for a medkit and armor.

Doom 3 Walkthrough - Doom 3 705
Doom 3 Walkthrough - Doom 3 705

Another commando charges at you from the door ahead. Take him out with your chaingun then continue into the room beyond.

Doom 3 Walkthrough - Doom 3 706
Doom 3 Walkthrough - Doom 3 706

Heal at the station on the left and read Charles Hollies' PDA to learn the code 142 for the storage cabinet in the back, which holds rockets, shells and armor. Unlock the airlock with the terminal ahead using the code 826.

Doom 3 Walkthrough - Doom 3 707
Doom 3 Walkthrough - Doom 3 707

Return to the train, battling Trites along the way.

Doom 3 Walkthrough - Doom 3 708
Doom 3 Walkthrough - Doom 3 708

Inside you'll find the train empty - not a good sign for Mr. Ryan. Activate this panel to send the train on its way again. After a short journey (you do not return outside) the train crashes.

Doom 3 Walkthrough - Doom 3 709
Doom 3 Walkthrough - Doom 3 709

A brief cutscene introduces you to your new surroundings. Climb that ladder ahead.

Doom 3 Walkthrough - Doom 3 710
Doom 3 Walkthrough - Doom 3 710

Immediately ready your chaingun for this charging commando. A medkit is at the far end of the walkway.

Doom 3 Walkthrough - Doom 3 711
Doom 3 Walkthrough - Doom 3 711

To the right is this door. Ready your machine as you enter -- Trites await.

Doom 3 Walkthrough - Doom 3 712
Doom 3 Walkthrough - Doom 3 712

Through another door you'll spot this commando running away. Don't be in such a hurry to chase him that you miss the cells and armor down the ladder to the right.

Doom 3 Walkthrough - Doom 3 713
Doom 3 Walkthrough - Doom 3 713

Unholster your chaingun before opening this Delta Labs door. Inside is this commando, plus a zombie and an Imp. After defeating this initial wave, two more commandos spawn.

Doom 3 Walkthrough - Doom 3 714
Doom 3 Walkthrough - Doom 3 714

Grab the medkit before readying your chaingun and opening the door seen on the right -- to find another commando.

Doom 3 Walkthrough - Doom 3 715
Doom 3 Walkthrough - Doom 3 715

You'll find two Z-Sectors in here -- the one that I'm firing on plus another on the stairs to the right. Ascend the stairs to the glass office upper-right.

Doom 3 Walkthrough - Doom 3 716
Doom 3 Walkthrough - Doom 3 716

Grab the medkit on the left. Karl Cullen's PDA on the right updates your security clearance and reveals the storage cabinet code for two cabinets - 364.

Doom 3 Walkthrough - Doom 3 717
Doom 3 Walkthrough - Doom 3 717

Betruger's disembodied voice commands, "Destroy him!" Imps spawn front and rear. Farther along the walkway another commando attacks.

Doom 3 Walkthrough - Doom 3 718
Doom 3 Walkthrough - Doom 3 718

You'll come to this security checkpoint, defended by a commando and a fat zombie. Defeat them then rush quickly through the broken window of the office ahead.

Doom 3 Walkthrough - Doom 3 719
Doom 3 Walkthrough - Doom 3 719

Karl Cullen's PDA gives you access to disable the automated turret at this security station, but you should wait until the turret rips through the spawning hellforces. This is most entertaining.

Doom 3 Walkthrough - Doom 3 720
Doom 3 Walkthrough - Doom 3 720

This neighboring room holds the two cabinets opened with code 364. Inside you'll find armor and ammo. Karl Kullen's PDA also grants you access to unlock the door on the left.

Doom 3 Walkthrough - Doom 3 721
Doom 3 Walkthrough - Doom 3 721

Pass through the deactivated security checkpoint to the transfer bay door ahead.

Doom 3 Walkthrough - Doom 3 722
Doom 3 Walkthrough - Doom 3 722

Activate the panel to load Delta Labs Sector 1.

More Doom 3 Walkthroughs

This Doom 3 walkthrough is divided into 27 total pages.

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