1. 🛗 REPAIR THE ELEVATOR

Your first objective is reaching the underground Mainframe Chamber.

You need two parts:

⚡ Fuse — Library

💻 Circuit Board — Director’s Quarters

The Fuse comes from the maintenance-worker zombie in the Library, while the Circuit Board comes from destroying the appropriate computer in the Director’s Quarters. Take both to the broken elevator in the Banquet Hall and repair it.

Call the elevator.

Naturally, zombies come pouring out.

Because apparently:

🛗 “OUT OF SERVICE”

actually means:

🧟 “FULL OF ZOMBIES.”

😂

Use the elevator route to descend into the Mainframe Chamber.

You’ll find S.A.M. and Pack-a-Punch down here.

2. 💾 WAIT FOR THE LAB TECHNICIAN

Progress through:

ROUND 10.

Afterward, watch for a special Lab Technician zombie in the Mainframe Chamber.

Defeat it.

It drops:

💾 FLOPPY DISK.

Pick it up.

Yes.

In 2025’s cutting-edge secret government facility, the fate of humanity depends on:

💾 A FLOPPY DISK.

Beautiful.

3. 🖨️ GET YOUR PROTOCOL WORD

Take the Floppy Disk upstairs to the:

EAST FOYER.

Insert it into the computer.

The nearby fax machine begins printing while Vermin attack.

When it’s finished, read the paper.

Your game gives you one of four words:

🦀 CRAB

🪱 WORM

🦋 MOTH

❄️ YETI

Write yours down.

It changes between matches.

4. 🧮 SOLVE THE NURSERY CIPHER

Go into the:

🧸 NURSERY.

There’s a chalkboard containing six groups of letters.

For each letter in your four-letter protocol word:

Find which chalkboard group contains that letter.
Count how many letters are in that group.
That number becomes the corresponding digit.

Do this for all four letters.

That produces your:

🔢 FOUR-DIGIT CODE.

Zombies:

“Survive the undead.”

Shattered Veil:

“Actually, today’s lesson is reading comprehension.”

😂

5. 👹 RELEASE THE DOPPELGHAST

Take the code into the:

SERVICE TUNNEL.

Find the locked containment chamber and enter your four-digit code.

The door opens.

And out comes an:

👹 HVT DOPPELGHAST.

Defeat it.

It drops the quest item you need for the biometric system.

6. 🔫 GET THE RAY GUN MARK II

Continue deeper into the Service Tunnel to the:

ARMORY.

Use the item from the Doppelghast on the biometric scanner.

The display case opens.

And there it is:

🔫 RAY GUN MARK II.

The classic BO2 Wonder Weapon has officially returned.

But here’s the part our original walkthrough needed to be much clearer about:

❗THE BASE MARK II ISN’T ENOUGH.

The Main Quest requires its three elemental variants:

🔥 Mark II-W — Wraith Fire

☣️ Mark II-R — Rot Blight

✨ Mark II-P — Preservation

And yes…

WE NEED ALL THREE.

7. 🧪 GET THREE EMPTY CANISTERS

There are three different quest methods for obtaining the three Empty Canisters.

One comes from destroying the map’s blue crystals with the base Mark II or Dark Flare. The four possible crystal locations are the Conservatory, South West Balcony, Service Tunnel, and East Foyer; one eventually drops the canister.

Another is trapped near the Rear Patio and can be pulled out using an LT53 Kazimir; there’s also a guaranteed Kazimir spawn in the Service Tunnel if you haven’t crafted one.

The third involves checking whether the giant Mainframe Chamber canister is labeled A or B, then using the corresponding Service Tunnel valve puzzle to fill it before freeing the canister.

Once you’ve got the canisters, we can start making variants.

8. 🔥 CREATE MARK II-W — WRAITH FIRE

Head to:

🪨 SHEM’S HENGE.

Put an Empty Canister into the yellow machine near Speed Cola.

An Abomination appears—one in solo, two with multiple players.

Do NOT immediately eliminate it.

You need its attacks.

9. 🪨 USE THE ABOMINATION ON THREE ROCKS

There are three smaller stones around Shem’s Henge.

For each one, bait the Abomination into using its beam attack to charge the stone, then bait its charge attack into the energized stone.

The rock rises.

Repeat until:

🪨 Rock #1 — FLOATING

🪨 Rock #2 — FLOATING

🪨 Rock #3 — FLOATING

The Abomination then disappears and an energy-siphon event begins.

10. 🐛 DEFEND THE SIPHON

Vermin start rushing toward the energy siphon.

Stop them from reaching it.

Regular zombies aren’t the important enemies here—the Vermin are specifically trying to interrupt the process.

Successfully defend it and your canister becomes:

💥 EXPLOSIVE CANISTER.

Take it to the Supply Depot workbench and convert your Mark II into:

🔥 RAY GUN MARK II-W — WRAITH FIRE.

11. ☣️ CREATE MARK II-R — ROT BLIGHT

Next we need:

🌱 FOUR PLANT SEEDS.

Destroy the special mature plants scattered around the map using the appropriate in-game damage until you’ve collected four seeds.

Take them to the:

🌿 CONSERVATORY.

Place another Empty Canister into the machine on the upper level.

12. 🌱 GROW FOUR TOXIC SPORES

There are four yellow propagators.

Place a seed into one.

Defend it while it grows.

Harvest the spore.

Repeat for all four.

🌱 Seed #1

🌱 Seed #2

🌱 Seed #3

🌱 Seed #4

After all four are completed, retrieve the:

☣️ TOXIC CANISTER.

Take it to the Garden Pond workbench.

You now have:

☣️ RAY GUN MARK II-R — ROT BLIGHT.

13. ✨ CREATE MARK II-P — PRESERVATION

This upgrade requires:

💣 Essence Bomb

🪞 Reflector #1

🪞 Reflector #2

The Reflectors are found in the lion fountains at the Conservatory and South West Balcony.

The Essence Bomb comes from breaking the white Project Janus crates around the map; the eighth crate guarantees it if an earlier one hasn’t dropped it.

Use the Essence Bomb on the damaged wall in the Service Tunnel near the Tier III Armor location.

That opens:

🐍 SERPENT MOUND.

14. 🪞 COMPLETE THE REFLECTOR PUZZLE

Put your third Empty Canister into the machine.

Now position the two Reflectors so the blue energy beam reaches a Doppelghast statue.

Activate the central crystal.

The statue becomes a real Doppelghast.

Deal with it.

Reposition the Reflectors for the second statue.

Repeat.

Then do it again for the third statue, which produces a stronger HVT Doppelghast.

Complete all three.

Retrieve:

✨ LIGHT CANISTER.

Take it to the Director’s Quarters workbench.

And now:

✨ RAY GUN MARK II-P — PRESERVATION.

🎉 THREE-VARIANT CHECKPOINT

We now have access to:

🔥 W — WRAITH FIRE

☣️ R — ROT BLIGHT

✨ P — PRESERVATION

And every one corresponds to a different Liminal Space ritual.

The variants can be swapped using their respective workbenches, so a solo player doesn’t need to somehow carry all three simultaneously.

Now comes the REAL quest.

15. ✨ PRESERVATION — OPEN THE BANQUET HALL PORTAL

Equip:

✨ MARK II-P.

Go to the Banquet Hall.

Interact with the computer beside the painting.

Get eliminations with the Preservation variant to charge the:

🌀 LIMINAL PORTAL.

Enter it once it’s open.

Inside, find the bright red:

🍷 RITUAL ELIXIR.

Pick it up.

16. 🍷 COMPLETE THREE CHALICES

Pour the Ritual Elixir into three chalices:

🍷 Bottlery

🍷 Overlook

🍷 Garden Pond

Each chalice summons an:

👻 ELDER DISCIPLE.

Defeat it.

A symbol appears above that chalice.

Do all three.

Then return to the Banquet Hall.

Around the elevator you’ll see:

🔢 THREE NUMBER SETS.

Write them down left to right.

17. 🦌 GET THE ANTLER CARVING

Go to the safe in the West Hallways, near Death Perception.

Enter the three number sets in the order you recorded them.

The safe opens.

Grab:

🦌 ANTLER CARVING.

Return to the Banquet Hall Liminal Portal with the Preservation variant.

Place the carving on the pedestal.

🚨 RITUAL START.

An HVT Elder Disciple appears, and its special shield must be dealt with using the Mark II-P Preservation variant.

Complete the encounter.

Then reclaim the:

🏺 SENTINEL ARTIFACT.

RITUAL #1 — COMPLETE. ✅

18. 🔥 WRAITH FIRE — FIND THE SCONCE

Switch to:

🔥 MARK II-W.

In the Banquet Hall, locate the boxed:

🕯️ SCONCE.

Take it into the:

GRAND FOYER.

Install it into the empty wall position beside the existing sconces near Jugger-Nog.

And…

🎵 SIMON SAYS.

Because no Zombies quest is legally allowed to exist without Simon Says apparently. 😂

19. 🕯️ COMPLETE SIMON SAYS

Watch the sconces flash.

Repeat their sequence.

There are three rounds:

1️⃣ One flash

2️⃣ Two flashes

3️⃣ Three flashes

Finish all three.

A secret passage opens into the:

🍾 DISTILLERY.

20. 🔥 OPEN THE DISTILLERY LIMINAL PORTAL

Interact with the computer beside the Distillery painting.

Use:

🔥 MARK II-W

to charge the portal.

When it opens:

⚠️ ACTUALLY ENTER IT.

This is important—the later quest item won’t properly become available until you’ve gone inside the Liminal Space at least once.

21. 🔔 GET THE BELL

Head into the:

📚 STUDY.

Find the Bell. It has multiple possible spawn points around the room.

Take it to the bar at:

🍸 OVERLOOK.

Place it beside the:

“Please ring the bell for service”

sign.

Okay.

What now?

Surely something normal.

No.

22. 🧟 GET A ZOMBIE TO ORDER A DRINK

Use Brain Rot to turn a zombie friendly near the bar.

Ring the Bell.

The affected zombie heads behind the bar and interacts with the setup, leaving behind the:

🍶 METAL HIP FLASK.

Pick it up.

I want to emphasize:

We just interrupted the zombie apocalypse so one zombie could:

🍻 GO TO THE BAR.

This quest is incredible. 😂

23. 🔥 COMPLETE THE HIP FLASK RITUAL

Return to the Distillery’s Liminal Portal with:

🔥 MARK II-W.

Put the Metal Hip Flask on the pedestal.

An:

💥 HVT MANGLER

appears.

Its special shield requires the Wraith Fire variant.

Complete the ritual.

Retrieve the Sentinel Artifact.

RITUAL #2 — COMPLETE. ✅

24. ☣️ ROT BLIGHT — OPEN THE LIBRARY PORTAL

Switch to:

☣️ MARK II-R.

Head into the:

📚 LIBRARY.

Use the computer beside the painting.

Get eliminations using Rot Blight until the Liminal Portal opens.

And once again:

ENTER THE PORTAL.

Doing so causes the next quest objects to become available.

25. 👻 AETHER SHROUD SCAVENGER HUNT

Now we need three hidden objects:

📼 Audio Log

📖 Ledger

🪪 Nuclear Plant ID Badge

But there’s a catch.

👻 THEY’RE HIDDEN UNLESS YOU USE AETHER SHROUD.

Activate Aether Shroud and search their possible locations. If you don’t have the Field Upgrade unlocked, the Mainframe Chamber contains an interactable canister that can supply a charge for this step.

The objects have alternate spawn points, so don’t assume yours will be in the first place you check.

26. 📚 SOLVE THE THREE-BOOK PUZZLE

Once you have all three objects, return to the Library.

Opposite the Liminal Portal are:

📚 THREE GLOWING WHITE BOOKS.

Interact with them in the correct sequence.

The sequence can be determined by trial and error: a correct first book takes on an Aetheric blue glow; then determine the second and third.

Complete the sequence.

🚪 SECRET ROOM OPENS.

Inside is:

☢️ NUCLEAR PLANT INSPECTION REPORT.

27. ☣️ COMPLETE THE FINAL RITUAL

Take the report into the Library Liminal Portal while equipped with:

☣️ MARK II-R.

Place it on the pedestal.

An:

👹 HVT AMALGAM

appears.

Its special shield requires Rot Blight.

Finish it.

Retrieve the Sentinel Artifact.

RITUAL #3 — COMPLETE. ✅

And now we’ve completed:

✨ Preservation → Elder Disciple

🔥 Wraith Fire → Mangler

☣️ Rot Blight → Amalgam

The Sentinel Artifact is ready.

28. ⚠️ PREPARE FOR THE FINALE

Before continuing, get everything in order.

The finale is a four-phase boss fight, and the detailed quest guide notes that it does not provide conventional Max Ammo drops between phases, although ordinary enemies drop ammunition more frequently during the fight.

When you’re ready:

Go down into the:

🖥️ MAINFRAME CHAMBER.

Interact with the console in front of S.A.M.

And…

⚠️ THIS STARTS THE FINALE.

29. 🤖 S.A.M. HAD OTHER PLANS

The Sentinel Artifact gets handed over.

And things go…

EXTREMELY BADLY.

Without dumping every story spoiler into the walkthrough, the crew winds up trapped in a strange Liminal environment connected to Richtofen and the events surrounding his family. The escape involves Shem’s spacetime technology.

And somehow—

SOMEHOW—

this causes the mansion’s giant dinosaur fossil to become:

🦖💀 Z-REX.

Zombies started with:

“Board up that window.”

And now we’re at:

“FIGHT THE UNDEAD TYRANNOSAURUS.”

😂😂😂

30. 🦖 Z-REX — PHASE ONE

The Z-Rex has several major attacks throughout the encounter, including close-range attacks, tail attacks, leaps, and a ranged toxic attack that can leave dangerous areas around the battlefield. There is no instant-wipe mechanic, so survival and movement are the keys to the fight.

During Phase One, watch for:

☣️ TOXIC ZOMBIES

around the Z-Rex.

These can provide major damage opportunities.

Its:

👁️ GLOWING EYES

are also vulnerable targets.

Keep moving.

Don’t let it corner you.

31. 🦖 PHASE TWO

The Z-Rex gets:

🏃 FASTER.

And so do the enemies around you.

Meanwhile, the arena can become increasingly cluttered with toxic hazards.

Use the arena’s structures to put obstacles between yourself and the dinosaur whenever you’re repositioning.

This boss has apparently never heard of doors.

Fortunately:

WALL > DINOSAUR.

😂

32. 🦖💨 PHASE THREE

Now the Z-Rex becomes fast enough that simply trying to outrun it in a straight line is unreliable.

Instead:

Keep moving around obstacles → create distance → use safe damage windows → move again.

When it turns toward you and begins closing the distance:

MOVE.

Don’t stand there trying to squeeze out another few seconds of damage.

33. 🦖🔥 PHASE FOUR

This is maximum:

ANGRY DINOSAUR MODE.

The Z-Rex spends much more of its time running and only periodically slows down for certain attacks or interactions.

Those pauses are your opportunities.

Stay mobile until you’ve got a safe opening.

Then:

DAMAGE.

Back to moving.

Wait for another opening.

DAMAGE.

Repeat.

Until finally—

💥💥💥

🦖 Z-REX DEFEATED.

The creature returns to its skeletal state and the ending cinematic begins.

🏆 SHATTERED VEIL — COMPLETE

And this is the important correction to our original guide:

Shattered Veil isn’t simply:

“Get Mark II → do some rituals → fight dinosaur.”

The real structure is:

THREE MARK II VARIANTS

+

THREE DIFFERENT LIMINAL QUESTLINES