Main Quest Video Guide
Step 1-8
Pack-A-Punch & Initial Items
Activate Pack-A-Punch.
Kill the Geneticist Zombie in the T1 Mutant Research Lab and pick up the Keycard.
Open the fridge inside the T1 Mutant Research Lab and grab the DNA Vials.
Obtain the Syringe from the centrifuge in the T1 Mutant Research Lab.
Jump into the Particle Accelerator in T2 Sublevel 10 and, while you're an orb, hit the body to knock it down.
Interact with the body to get the Blood Sample.
Place the Syringe back into the centrifuge — this spawns a Fowler Mangler. Kill it and pick up the Fowler-Mutant Injection.
Go up the stairs in T2 Dark Entity Containment and interact with the scanner next to the closed door, then use the Fowler-Mutant Injection in front of the scanner to scan yourself. This opens the door to a portal.
Tip
If you need another Fowler-Mutant Injection, you can purchase one from the centrifuge for 1,500 Salvage.
Note
You'll need to build Franken Klaus for the next step — see below.
Build
Franken Klaus
Obtain two Arms and two Legs:
- Arms — Dropped from shooting the arms off Kommando Klaus zombies during special rounds. You cannot obtain both arms in the same round.
- Legs — Parts are scattered around Android Assembly:
- Behind a door
- Behind a broken mirror
- Scrap pile
- On the ground near shelves
- On a shelf
Place the arms and legs on the hanging Klaus in T2 Android Assembly.
Have an Uber Klaus use an electricity attack on the hanging Klaus — this brings Franken Klaus to life.
Step 9-10
S.A.M. Trial & the Brain
After building Franken Klaus, he'll type on a computer. After ending a round, he'll fly to T2 Dark Entity Containment and stop in front of a S.A.M. Trial.
Complete the S.A.M. Trial. Franken Klaus will then fly through the portal to the T2 Teleportation Lab and start typing on a keyboard.
Purchase Melee Macchiato and punch open a metal container in the T1 Quantum Computing Core near a terminal. This lets you pick up a brain.
Quickly bring the brain to the T2 Teleportation Lab and place it in the machine next to Franken Klaus.
Step 11-12
Find the Code Documents
Find 4 documents, each containing a number and a date. The number on each document forms part of a 4-digit code; the order of the digits is determined by the dates, earliest to latest.
Document locations:
- T1 Executive Suite — Table
- T1 Executive Suite — Desk
- T1 Executive Suite — Coffee Table
- T1 Director's Office — Desk
- T1 Director's Office — Shelf
- T1 Director's Office — Coffee Table
- T2 Teleportation Lab — Terminal
Possible Documents & Dates
- BND Badge — 6/28/1985
- Notso's Collar — 7/15/1985
- Scarf — 8/21/1985
- Wristwatch — 9/2/1985
- Combat Goggles — 10/12/1985
- Katana — 12/8/1985
Enter the resulting 4-digit code into the computer in the T2 Teleportation Lab.
Note
You'll need to obtain the Gorgofex for the next step — see below.
Build
Gorgofex
Activate Pack-A-Punch (if not already done).
Find two monitors with static in the T1 Mutant Research Lab, near Deadshot Daiquiri and PHD Flopper. They occasionally flash words — note down the first letter of each word.
Use the Periodic Table near one of the monitors to find an element containing both letters. Note the number in the top-left of that element.
Use that number on either number pad up the stairs near the Periodic Table to open the doors.
Find the Cyst in the glass case in the T1 Bioweapons Lab. Kill vermin, then zombies, near it one at a time until the case opens — grab the Cyst.
In T1 Quantum Computing Core/Lab, go near the yellow spores to charge the Cyst and drain the Aetheric Flora's health.
Activate 4 computers in quick succession in T2 Dark Entity Containment that say "Initiate Power Surge". This spawns an Uber Klaus.
Destroy the Uber Klaus's shoulder pads, then bring it onto the metal plate in front of the Forsaken. This turns the Uber Klaus into the Forsaken.
Kill the Forsaken — it drops the Gorgofex.
Tip
If the element's number is 1 or 2 digits, pad it with leading zeros (e.g. add "00" before a 1-digit number, or "0" before a 2-digit number).
Choose One Upgrade
Gorgofex Upgrade Path
Warning
Once you start one upgrade questline, you cannot do the other. Choose carefully.
Obtain the Gorgofex.
Interact with the door in the T1 Executive Office to talk to Blanchard.
Interact with the Red Button in T1 Project Janus Reception — this spawns a Maintenance Klaus. Protect him until the Shutdown Progress completes. Afterward, one elevator becomes broken.
Use the opposite, still-working elevator to ascend.
Jump down the broken elevator and interact with the 3 red buttons on the way down.
Go to T1 Quantum Computing Core and kill the blue zombies with the Gorgofex until Panos spawns in the room.
Interact with Panos to upgrade to the Gorgofex Corpsloder.
Obtain the Gorgofex.
Interact with the door in the T1 Executive Office to talk to Blanchard.
Obtain a Strauss Counter from the terminal in T1 Quantum Computing Core.
Use the Strauss Counter to find a red area with a high number and shoot it with the Gorgofex to locate and grab the Life Drain Essence.
Collect 3 parts to build the Essence Extractor:
- Tubing — T1 Quantum Computing Lab, outside against a wall
- Clean Hood — T1 Bioweapon Labs, against a wall to the left of the Cyst
- PC Fan — Dark Entity Containment, to the left of the Arsenal
Assemble the Essence Extractor at the T1 Executive Office where you talked to Blanchard.
Place the Life Drain Essence on the Essence Extractor to start a lockdown — defend the Essence Extractor.
After the lockdown, grab Blanchard's Life Essence from the Essence Extractor — this makes you walk slowly.
Take Blanchard's Life Essence to the T1 Bioweapons Lab and use the Gorgofex on the glass case next to where the Cyst was, to upgrade to the Gorgofex Necrodystonia.
Step 13-14
Quantum Energy & the Portal
Interact with the red button on the terminal in T2 Sublevel 10. This starts a lockdown that spawns Quantum Vermin, which can only be killed using the Gorgofex.
Kill enough Quantum Vermin. If done correctly, when the lockdown ends you can interact with the canister above the terminal using the Gorgofex to put Quantum Energy on it.
Go to the T2 Teleportation Lab and use a charge shot on the broken portal with your Gorgofex while it still has Quantum Energy. This opens the portal — you don't need to go through it.
Step 15-17
The Fungal Head
Go to the hole in the ground in T1 Mutant Research Lab and use a charged Gorgofex shot on the ledge with the spore. This drops a Fungal Head into the T1 Quantum Computing Core — pick it up.
Punch a Janitor's Bucket in T1 Project Janus Reception near the metal detectors to place it underneath a sprinkler.
Activate the sprinklers to fill the bucket with water.
Once full, place the Fungal Head into the bucket, then pick it back up.
Get kills either while holding the Fungal Head, or drop it and get kills near it (recommended).
Once you have enough kills, place the Fungal Head into the portal in the T2 Teleportation Lab. This spawns moving items around the map that will stun you when you get nearby.
Tip
The sprinklers go off randomly, but you can force them by throwing a molotov or smoke grenade underneath a smoke detector in a nearby barrier.
Warning
Holding the Fungal Head makes you move slowly and causes a ghostly entity to follow and damage you — dropping it and farming kills nearby is recommended instead.
Step 18
Capturing the Objects
The blue boxes around the map are now open — grab Vacuum-Seal Devices from them.
Throw the Vacuum-Seal Devices at the moving objects around the map, then pick them up to capture them.
Collect 4 total objects, then place the 4 Vacuum-Seal Devices in the slots in the T2 Teleportation Lab.
Step 19
Lockdown: The 5 Levers
Activate the machine with the Vacuum-Seal Devices to start a lockdown — zombies will come out of the portal.
While killing these zombies, 5 levers around the room will come online one by one, turning red and making a noise.
Press each lever quickly as it comes online to turn it green.
After all 5 levers are activated, the lockdown ends.
Step 20-22
Boss Fight Setup
Interact with the Portal in the T2 Teleportation Lab to be teleported to the T3 Artifact Amplification Chamber.
Interact with the Sentinel Artifact — you'll be given a choice between two boss fights. Help Richtofen to fight S.A.M., or help S.A.M. to fight Richtofen.
The elevator begins to ascend. When it stops, get kills near 3 LTGs, then get back on the elevator to continue.
When the elevator stops again, destroy all the Aether Crystals, then get back on the elevator to continue.
Tip
Choosing to help Richtofen (fighting S.A.M.) is generally considered the easier option.
Final Steps
Boss Fight
S.A.M. is invulnerable most of the time. Shoot her when she spins and throws out mines.
She'll also do a laser attack. Afterward, she temporarily stops moving and opens up 4 cores — shoot and break them one by one for critical damage.
After all 4 cores are broken, her center eye becomes her weak spot.
Periodically, she'll disappear and either spawn zombies or start a S.A.M. Trial. Completing the trial rewards a random perk; failing gives a temporary weapon nerf.
Warning
Chopper Gunners will be shot down during this fight — it's advised not to use any.
This fight is split into two phases.
Phase 1 — Uber Richtofen: He'll eventually put up a shield. Break the cores on his shoulders to lower it.
Phase 2: Richtofen flies around with a jetpack and Wunderwaffe, shooting at you and firing missiles.
He can also leave the arena and briefly return to do a bombing run, then land with a massive explosion that deals heavy damage to anyone nearby.