Reckoning — Black Ops 6 Zombies Easter Egg Guide

Before anybody moves: in Project Janus reception, melee the mop and bucket until it sits under the sprinkler — go prone or change angle if it will not shift — then run through the metal detectors. That sets the sprinklers off and fills the bucket with water, which you need much later for the fungal head. It costs thirty seconds now and saves a hunt later.

Open the map toward Mutant Research first — both creators agree it is the better route. In the T1 Mutant Research Lab, find the big blue tank with a Mangler inside; just to its right is a console. Hold interact to take the syringe part — this starts the boss-teleporter chain immediately, so grab it on the way past.

Loadout: both creators run the Maelstrom shotgun for everything pre-boss. For the boss itself MrRoflWaffles rates an AMR or SVD above the Wonder Weapon and above scorestreaks, especially against Richtofen, with Tribologist on PhD Flopper for mobility. Melee Macchiato is required for the brain step later.

Follow the orange markers through the Executive Office route to the Director’s office and interact with the snow globe to open the route to Sublevel 10. Continue through Android Assembly and Dark Entity Containment.

At Sublevel 10, restart the particle accelerator with the power button, then shoot the twelve Aetherium deposits — the purple crystals on the pipes marked with orange symbols. Pack-a-Punch is then live.

With Pack-a-Punch active, both sides of the particle room glow orange and a human body floats in the beam. Go up onto the side walkway and jump into the beam — you become a small ball orb.

Steer the orb toward the floating body, avoiding the other floating objects, and nudge into it so the body falls to the floor. Drop out of ball form, run to the body and hold interact to use the syringe and take the blood sample.

Retries are free: items in the laser periodically despawn — wait ten or fifteen seconds and re-enter. There is no attempt limit. If you cannot get into the beam from one side, jump in from the other.

Start this early and chip away at it alongside everything else. Klaus needs two arms and two legs.

The arms are the bottleneck: they only come from the special Commando Klaus rounds, roughly every five or six rounds, and you can only get one arm per special round. That means at least two special rounds — so if you leave this late, you will be waiting on the game rather than on yourself. Shoot the robots’ arms specifically, and watch the ground where they die so you never miss a drop.

Both legs are in T2 Android Assembly and are always available — grab both in one visit. Known spots: on a shelf just above head height, by the broken-down door in front of the teleporter, near the broken TV, by the fiery box area, and the corner by the box in front of the up elevator.

Assemble: hold interact on the Klaus droid facing the teleporter in Android Assembly once you have all four parts. Aim to have him built before around round 16, when an Uber Klaus spawns naturally and can activate him.

The other guide: MrDalekJD describes the arm as a chance drop rather than guaranteed — shooting the arms specifically is what makes it reliable.

Return to the syringe console and insert the blood-filled syringe. The test chamber spawns Fowler, a chatty and genuinely strong Mangler HVT — have your gun Pack-a-Punched if you are deep into the rounds. Kill it and take the green vial, the Fowler Mutant Injection. If you later fail the retina scan or waste the injection, you do not need to farm another special round — a replacement can be bought from the Centrifuge for 1,500 salvage. Other chambers then open with a Disciple and toxic zombies — kill them promptly so the Disciple stops buffing the horde.

While you are here: a unique geneticist in a green lab coat spawns in the research rooms once Pack-a-Punch is active, around round 5 or 6. It drops a gold key card — and it can spawn at any time, so you may have already killed it. Check the floor around both rooms. The card opens the fridge in the room with Richtofen’s wife and son, holding the DNA vial.

Now go to T2 Dark Entity Containment, up the stairs to the retina scanner. Activate the Fowler injection to become the mutant, then interact with the scanner — it reads Fowler’s eye, ejects you, and opens the secret door to the new teleporter room. That teleporter is later the boss portal.

The terminal in the new room needs a four-digit code built from four documents scattered around the map. More than four spawn points exist but you will have exactly four notes in your game. Screenshot each one as you find it.

Each note carries a number before the item name — for example “5 Combat Goggles” — and an archive date.

The rule: order the four notes by archive date, oldest to newest, then read off each note’s item-number in that order. That is your code. Enter it at the terminal in the T2 Teleportation Lab for ACCESS GRANTED.

Use the full date, not just the month. MrDalekJD sorts by month number alone, which works in his game but breaks the moment years differ or two months repeat. MrRoflWaffles sorts on the full date — that is the safe rule.

• Director's office desk, left side; the small desk round the corner by the lamp; the coffee table down the stairs in the projector room
• T2 Teleportation Lab — on the desk where Klaus hacks
• T1 Executive Suite, on the circular table by the knocked-over furniture near the weapon wallbuy
• The main desk outside the offices up the stairs from Juggernog, and the corner of the big white table under the TV

Buy Melee Macchiato — the machine is in the T1 Quantum Computing Core, the same room you need. Melee the computer box there to reveal a blue brain, then interact to carry it. Your weapon is stowed while you hold it.

Timed: sprint it to the T2 Teleportation Lab. Fastest route is the launch pad to Android Assembly, elevator up to Dark Entity Containment, up the stairs and through the teleporter, then place the brain in the receptacle. A quote confirms it.

Fail state: if the timer lapses, wait for the next round, grab the brain again and re-run. No permanent loss.

Note: plain melee may not break the machine — Melee Macchiato appears to be genuinely required, not just helpful.

Two static screens in the Mutant Research Lab briefly flash a green word before returning to static, repeating every few seconds. One is left of Deadshot Daiquiri, the other behind the chamber holding Richtofen’s wife and son.

Take the first letter of each word — Nettles and Deceitful gives N and D. Match that letter pair to a chemical element symbol on the periodic table poster in the lab, and read its atomic number. Pad it to three digits: 60 becomes 060, 1 becomes 001.

Try it both ways round: the letter order is not fixed, so if PR gives nothing, try RP. You get two code attempts per round. If one screen is off entirely, use the single letter on its own.

Confirmation cue: the keypad upstairs lights blue and the Bioweapons Lab opens. The words re-randomise every round, so read them fresh each attempt.

Inside the Bioweapons Lab a cyst sits behind glass and behaves as a soul box, but with an unusual rule.

Damage, do not kill. Wound zombies next to the machine without killing them so vermin burst out, then lightly damage the vermin in front of the cyst. They levitate and get sucked into the tube — a small yellow glow above the cyst confirms each capture. Assume three vermin then three zombies.

When it is full, interact to pick the cyst up and carry it to the T1 Quantum Computing Core — you can drop down through the floor to get there.

Three large etheric flowers grow in and around the plant room. Stand under each and the cyst auto-deploys with a drain bar. Drain all three to zero. The yellow flowers spit damaging goo, so hold the line between close enough to drain and far enough to dodge. Progress persists — you can run a lap to shake zombies and come back mid-bar.

In the Forsaken room, interact with the computer whose screen reads INITIATE POWER SURGE — active screens also give a distinct audio cue. On a timer, activate the remaining ones; there are four computers in the room, and running it anticlockwise hits them all in time.

Confirmation cue: a big electrical surge into the Forsaken’s corner, and an Uber Klaus spawns.

Do not simply kill it. Shoot both shoulder plates off, then lead it onto the electrified floor plate in front of the Forsaken. The Forsaken transfers into the Uber Klaus, creating the Forsaken-Klaus HVT and then its core. Bring Pack-a-Punched weapons.

The reward: killing it gets you the free Gorgofex. MrDalekJD has it drop directly; MrRoflWaffles gets a blood fusion that you combine with the cyst to spawn the weapon. Same result either way.

With Klaus built, lure an Uber Klaus to the body and let it fire its ranged energy attack next to him. The zap brings Klaus to life — a quote confirms it. Then kill the Uber Klaus normally.

Klaus stands up and types on the computer beside him. Flip to the next round and he moves — follow closely or you will lose him. He stops in Dark Entity Containment at a SAM trial; flip the round again to activate it, then complete it (usually eliminating zombies inside a marked zone — check your map).

Confirmation cue: he moves to his third spot, through the Fowler teleporter into the T2 Teleportation Lab, and starts hacking. That is your prompt for the document code and brain run if you have not already done them.

At T2 Sublevel 10, trigger the boost — the desk screens read BOOST READY, or hold interact on the same switch that activated Pack-a-Punch to turn the particle beam red. Ghostly blue quantum vermin spawn and you must kill them fast with the Gorgofex. Expect four or five, most of them watching from high up with one on the ground, on a tight timer.

When it completes, the floating canister above the room carries a glowing blue orb — interact to attach it to your Gorgofex.

Do not fire any weapon while the blue orb is attached. Shooting loses the orb and you redo the whole step next round. Walk it, do not fight it.

Carry it to the T2 Teleportation Lab and hit the boss portal crystals with a charged shot to destroy them and materialise the portal.

The fungal head. Back in the Quantum Computing Core, put a charged Gorgofex shot into the spore in the window corner — easier from the upper level — and a fungal head drops. Dunk it in your water-filled bucket, let it clean, and pick it back up.

Carrying the head: you cannot sprint, and you become a mobile soul box needing roughly thirty kills. Once souls start filling, a shadowy figure with glowing eyes stalks you and damages on contact — keep moving, and farm in the direction of the Fowler teleporter since that is where you are going.

Finish: take the full head through the Fowler teleporter to the boss teleporter and interact — the head floats onto it.

You get exactly one. Upgrading to one variant locks out the other for that game, so decide before you start. MrDalekJD rates Gorgofex N as slightly stronger for the quest and boss; Gorgofex C is the easier path.

Gorgofex C — the Peck side. Interact with Blanchard’s door in the Executive Suite for a quick line of dialogue. In Project Janus reception, press the big red button to trigger a shutdown; wait for the maintenance Klaus to finish at the central PC, and one reception elevator breaks. Ride the working elevator up the opposite side, find the broken elevator’s shaft and parachute down it, hitting all three glowing red buttons on the way. Miss one and you simply retry — attempts are unlimited. You are launched back up to an orb, which then possesses zombies and turns them electric blue. Kill every blue zombie using only the Gorgofex; their orbs spiral around the main machine in the Quantum Computing lab. When they are all down, interact with the ghost at the front of that structure while holding the Gorgofex.

Gorgofex N — the Blanchard side. Talk to Blanchard’s door; he asks for items. Take the Strauss counter from the terminal mid-room in the Quantum Computing lab, teleport to the other tower, and follow the radiation reading — it peaks around 9.6 and usually leads to a zombie window barrier. If nothing is visible in the window, fire a charged Gorgofex shot near it to tip a box and pop out a vial. Then gather three parts: a clean hood from the scientist corpse in the corner of the Bioweapons Lab, a PC fan in the Forsaken room on the machinery left of the Arsenal station, and tubing outside the Quantum Computing area near Speed Cola. Return to Blanchard’s door to build the essence extractor, insert the vial, and survive a 90-second lockdown protecting the machine from zombies and Klaus robots. Then carry Blanchard’s life essence to the T1 Bioweapons Lab — it drains your health as you go, exactly like a Liberty Falls canister, so put it down briefly to recover and re-grab. Interact with the glass machine right of the cyst spot to craft it.

Source note: both upgrade paths come from MrDalekJD only — MrRoflWaffles’ main guide skips them entirely.

The previously locked Project Janus security boxes are now open, each holding a vacuum seal device. It replaces your tactical and throws like a Kazimir — but you must pick it back up after each use.

Around the map, mostly in Tower 1, are purple floating objects. Throw a device at one, it gets sucked up, then retrieve the device. Your quest inventory count increments each time — check it every grab. You need four filled devices.

Where to look: a purple flower pot in spawn reception, a toolbox on the outside edge of Quantum Computing, a trash bin and boxes in the Mutant Research test area, and three or four objects around the Executive Suite and Director’s office. Device boxes sit nearby in each area, plus Android Assembly, the back of Dark Entity Containment, and the Teleportation Lab.

Pre-boss checklist: triple Pack-a-Punch, all perks, ammo mods, gums, a crafted self-revive, a big bank of points for ammo buys, and four devices in inventory.

In the teleporter room, insert all four devices and press READY to start the lockdown. Several wall switches in the room light red one at a time with an audio cue, only five to ten seconds apart — run to each and interact to turn it green. The screen flashes white when you are done.

The other guide: MrDalekJD instead describes three switches spread around the map about twenty seconds apart, with Uber Klauses spawning throughout — be ready for either.

Co-op: nobody is pulled in until everyone votes ready at the portal.

Take the portal, interact with the Sentinel Artifact and vote. Siding with Richtofen means you fight SAM — both creators agree this is the easier fight. Siding with SAM means fighting Richtofen, which is much harder.

Both sides share the vaults. Vault 1: fill three soul boxes — interact, then kill zombies beside each — in the corner, the middle, and past-middle-right. Arsenal machines and Der Wunderfizz are here if you skipped perks. Vault 2: the ceiling has purple lights, some of which are dark aether crystals in randomised positions. Shoot every crystal — you cannot advance until they are all gone.

SAM — the easier fight. She is immune except during two attacks. After her laser beam ends, red critical points and her eye are briefly exposed — hide behind cover during the beam, then unload; Kazimir or Aether Shroud makes that window enormous. She is also damageable during her centre-arena spin. Otherwise train the perimeter, farm armour from heavies, and accept it is a tanky, patient fight. At the 75%, 50% and 25% health marks she despawns for a SAM trial — completing it grants a free perk, which is excellent if you lost Quick Revive, and failing it can leave you with a debuff. In the final phase she can launch you skyward; paraglide down and keep running.

Richtofen — the hard fight. An Uber Klaus on steroids: extremely tanky with weak shoulder pads to shoot off, air-dive body slams, and a nuke for anyone who stands still two seconds. Expect immune phases with zombie waves between. At zero health on the Uber body he becomes a flying Klaus core, strafing the arena with a Wunderwaffe plus air raids and dormant floor bombs, with Uber Klauses and special-round Klauses as adds. Keep moving clockwise to dodge his sky beams and burst him during Aether Shroud windows. MrRoflWaffles rates the AMR with Tribologist above both scorestreaks and the Wonder Weapon here.

The other guide: MrDalekJD ties the SAM trials to damage thresholds with different rewards — a perk power-up, then a Max Ammo spawn, then a random perk for a legendary completion.