Citadelle des Morts — Black Ops 6 Zombies Easter Egg Guide

Follow the objective markers from spawn, buying doors until you reach the Courtyard in front of the castle. Head to the cannon, crank it to face the blocked door, then get behind it and fire.

Follow the markers down into the Undercroft. In the oubliette room, shoot the three locks off the box. A Doppelghast spawns — kill it for a Blood Ethereum Crystal, then insert the crystal into the portal to raise Pack-a-Punch.

Confirmation cue: follow the next objective into the dungeon and find the small wooden door in the cubby off the adjacent room. Let the Easter-egg dialogue finish, then hold interact to open the window flap and talk to Gabriel Krafft.

Bring for later: the Dead Wire ammo mod (stag sword), Melee Macchiato (symbol wall) and three crafted Molotovs (Ra’s Ankh — or use the fire sword’s charged attack instead).

In the sitting rooms near Stamin-Up, find four torn pages marked with glowing red eye symbols. There are around nine possible spawn points and you need four — this can be done at any point once the rooms are open, so sweep it early while the rounds are cheap.

Confirmation cue: each pickup flashes a marker top-right, and your menu shows torn page fragments IV once you have all four.

• On the wall right of Stamin-Up, just left of that, and behind you as you face Stamin-Up
• On or beside the sofa, and against the TV
• By the fireplace near the bunk beds, and on the table by the bunks
• Behind the boxes and on the floor beneath them, plus along the outer walls

From round 10 onward, zombies wearing knight helmets spawn. Killing one drops a glowing orange stamp. Carry each stamp to one of the four knight statues in the Dining Hall to receive that basic sword — any order, roughly one stamp per round, so push rounds if you want them faster.

Identifying the statues: read the insignia on the chest plate — except the Raven knight, which is marked by a raven on its shoulder instead. Stow and redraw a sword to re-display its name.

Needs confirming: the canonical sword-name to animal mapping. The transcripts give Caliburn for the dragon/fire sword and Durendal for the stag/lightning sword, with the lion name garbled and the upgraded raven sword called the Shadow sword — worth checking Solais and Balmung in-game before treating those names as fact.

Crystal lasers. Shoot the red crystal above Vulture Aid in the Dining Hall, then repeatedly stand where the beam points and shoot the next crystal to chain it: upstairs crystal, back down in front of Vulture Aid, slightly left of Vulture Aid, into the Alchemical Lab, then the crystal above the Arsenal machine shot from in front of the table. When every beam aligns, hold interact on the little statue to take the Paladin’s Brooch.

Deposit it in the yellow circle that spawns nearby and feed it souls — roughly 15 to 20 kills — until a chest appears and glows gold.

Parasite door. Past Speed Cola in the Upper Village, take a left; under a ceiling is a door with a lion statue. Melee it with the lion sword to light a symbol. Four yellow-glowing parasites spawn — melee one to make the sword glow yellow, then melee the door to deposit a symbol. Repeat until four symbols are lit; if you run out of parasites, take the next round.

Sanctuary. Interact with the finished door to be teleported into a chamber. Place the sword on the podium, then shoot the matching symbol on the ceiling each time one lights beneath it, four times over. The targets drift, so expect to need more than one shot. Take the glowing sword back, then melee the gold chest from earlier to unlock the Light Incantation.

The other guide: MrDalekJD places the matching symbols on the wall rather than the ceiling.

Place the basic Dragon sword in the dragon statue up the stairs from Juggernog. Three fire braziers light up — on the castle battlements, on the left side of the spawn area, and inside the spawn area along the right.

You burn while carrying fire: interacting with a brazier sets you alight and drains roughly 15 HP per second. Sprint straight back to the dragon statue and deposit before you hit zero.

The heal trick: melee the zombies that spawn in front of you to claw health back. MrRoflWaffles specifies the purple-eyed ones, which die instantly and restore you to full — worth prioritising if you see one.

After the third deposit the statue breathes fire; wait a few seconds, then take the upgraded fire sword.

Ra’s Ankh. Light three bonfires around the Hillside ramparts by the cannon, using Molotovs or the fire sword’s charged attack (both triggers): the debris pile just under the pylon, the balcony directly above the castle entrance, and just left of the acid trap toward Speed Cola. Each ignition spews zombies out of fireballs — that is your cue it took. The third spawns a Doppelghast; kill it and once it finishes exploding it drops Ra’s Ankh. Deposit it in the yellow circle in front of the castle, fill with souls, then melee the chest with the fire sword for the Fire Incantation.

The other guide: MrDalekJD gives the trio as the spawn corner, the nature path and left of the cannon — probably the same three braziers seen from different angles.

Collect three lightning rods, then place all three in the vase on the right side of the Hillside ramparts. A thunderstorm starts there with continuously spawning zombies.

Kill storm zombies with the stag sword — around six or seven of the purple-eyed ones — until the sword is visibly crackling with electricity, then melee the vase. The charge jumps across and electrifies one rod, and you get visibly shocked.

Fail state: no shock animation means the charge did not register. It is genuinely unreliable — MrRoflWaffles had three of five attempts land. Keep killing and try again.

Confirmation cue: with all three rods charged the vase stops spinning. Place the sword in it, wait, and retrieve the upgraded lightning sword.

Pegasus Horseshoe. Shoot it down from the roof by Deadshot Daiquiri and pick it up. Then take the cannon on the Hillside ramparts and fire yourself toward spawn. Lightning flickers and a small storm cloud forms somewhere on the map — hunt it down and collect the charged horseshoe from the ground beneath it. Deposit at the yellow insignia inside the spawn room, fill the soul box, and melee the chest with the lightning sword for the Lightning Incantation.

The other guide: MrDalekJD instead shoots the horseshoe down from above the doorway inside the barn on the nature path.

• Rod A — always leaning against the boxes left of the Deadshot Daiquiri machine
• Rod B — equip Dead Wire and shoot the electrical fuse box on the wall in the Upper Village near Speed Cola; a spark runs to an aerial and drops the rod
• Rod C — carried on the body of a random zombie; kill it and pick the rod off the ground. Often an armoured zombie near Quick Revive once Pack-a-Punch is up and you have spoken to Krafft

The hardest of the four. In the Alchemical Lab, search the shelves and tables for an Antiquity — an animal relic. Only one spawns per game, and each maps to a zodiac sign: two skulls for Gemini, a scorpion in rock for Scorpio, a fish fossil for Pisces, and so on. Other known spawns are a horn at head height, a jawbone opposite, and a pair of bird heads on a shelf.

Take it to the Tavern Cellar under the bar in spawn — the room with the metal rings on the wall. Insert the Antiquity in the centre, then insert the Raven sword into the slot.

The ring puzzle. Identify your item’s zodiac sign and its element (Gemini is Air, for instance). A green arrow sits above where the sword went in: rotate the inner ring so your sign’s element symbol aligns there, then rotate the outer ring to your zodiac symbol.

Fail state: solve it wrong or too slowly and you wait for the next round to retry.

Orb herding. Success opens a purple portal in the floor with purple orbs streaming from the rings. Lead three or four orbs into each portal by standing near it and moving slowly. The portal then relocates twice — cellar, then the main tavern floor, then upstairs by the pool table. Patience is the whole skill here: walk, do not run, and loop outside or up the stairs to bunch them together.

After the third portal closes, follow the orbs back to the rings and hold interact — the sword drops into the ground and returns upgraded.

Raven’s Talon. Take the cave slide behind Pack-a-Punch holding a bullet weapon and, near the end on a corner piece to the right, shoot the perched raven (a Krafft quote confirms it). Outside, the raven flies around the castle outskirts toward spawn — you can hear it. Shoot it down; it bursts in purple smoke and drops the Talon. Deposit at the yellow symbol in the Undercroft water room, fill with roughly twenty souls, and melee the chest with the Raven sword for the Dark Incantation.

The other guide: MrDalekJD reports the orbs damaging you on contact and resetting your stage if botched — MrRoflWaffles does not, so treat contact as risky but not necessarily fatal to the attempt.

Buy Melee Macchiato from the machine on the castle battlements and melee the wall in the Undercroft water room to reveal a panel of blue symbols.

Then, in and around the Tavern, interact with six vases marked with Roman numerals I to VI and note each one’s symbol in numerical order. Screenshot them — you will not remember six.

Return to the wall and shoot the symbols in that order. The wall reshuffles after each correct shot, and gets faster the further you get.

Easy to misread: several of the spike symbols differ only by having a circle outline around them. Match outline against no-outline exactly.

Confirmation cue: a character quote, then a red orb flies from the wall into the section beside it, revealing a book.

• I — always on the bar
• II — on the desk table
• III — above the cellar staircase
• IV — upstairs by the pool table
• V — on a table in the corner booth area
• VI — by one of the front doors

Place all four pages on the book. It shows four symbols, randomised each game, matching four of the Point of Power traps around the map — visible on your Tac-Map.

Work through them in book order: top-left, bottom-left, top-right, bottom-right. Find the trap whose floor emblem matches the current symbol (a white outline confirms it), activate it for 1,600 points, and kill roughly ten to fifteen zombies inside it. The trap ends early when you have done enough, and Krafft quotes to confirm.

Confirmation cue: recheck the book — completed symbols go dark. If a trap times out, wait for it to reset next round and retry.

Confirmation cue: after the fourth, the pages in the water room stop glowing and four animal symbols appear on the staircase wall just past the Alchemical Lab, numbered one to four. That diagram is the order you need for the next step.

Read the four-animal order off the staircase wall past the Alchemical Lab. If you have not already, melee each element’s golden chest with its matching sword to take that incantation — light by the dining hall, fire at the castle front, lightning in the spawn room, dark in the Undercroft.

Then for each animal in wall order: hold the matching sword and its incantation, stand before that knight statue in the Dining Hall, cast the incantation, then immediately weapon-inspect the sword while the statue glows.

Fail state, and it is a subtle one: moving to the next statue before the previous one has finished lighting up yellow means the next will not activate. Wait for the full glow every time.

Confirmation cue: after all four, the knights spawn a Mystic Orb that drops from above — pick it up.

Needs confirming: how to read the wall. MrDalekJD says the diagram is numbered 1 to 4; MrRoflWaffles describes a positional read instead. His order came out Raven, Lion, Stag, Dragon.

Place the orb in a holder and hold interact to start. It takes on an element and you feed it matching souls. Pick the orb back up after each success — a Krafft quote confirms.

Fail state: if the holder offers to start the elemental challenge again when you return, you were too slow and it needs restarting.

• Light — second floor of the Dining Hall opposite Vulture Aid. Big green orbs spawn around the area; just stand inside each until it dissolves. Zombies spawn but kills are not required
• Sword element — in spawn, just right of the incantation table. Kill only with the matching element, using that sword's trigger abilities and its incantation
• Fire — the Courtyard opposite the Max Ammo wallbuy. Roughly 20 to 30 kills with the fire sword's charged attack, the fire incantation or Molotovs; regular kills recharge the sword ability
• Void — Undercroft water room, just left of the dark-incantation chest. Only kills where zombies are sucked up and dropped from the sky count

Prep fully first: as many perks as you can hold, a Mutant Injection crafted from spare salvage, gums brought in, and a solid bullet weapon at tier-3 Pack-a-Punch. MrRoflWaffles specifically advises against the Ray Gun for this boss.

Place the charged Mystic Orb into the wall on the Undercroft stairway — the one bearing the four animals. The wall recedes; take the Guardian Key from the table. Then interact with the front of the statue in the spawn room to slot the cylinder in. In co-op the team votes to start.

Use the arena: all four incantations sit around the middle as pickups. Use them on the zombie waves — those zombies drop armour plates and ammo, and there are ammo buys in the room.

Opening: get behind the Golem and shoot its back to break the seal, after which it takes increased damage. Then work the glowing crit spots — torso first, later wrists and gauntlets, shoulders and knees, then chest and face near the end. Spots vanish periodically; deal generic damage until new ones open.

Statue phases: at roughly each 20% chunk of health the Golem becomes an immune statue in the centre and you simply survive and clear the horde, first Doppelghast included. Swords and incantations shine here — also scavenge armour and recharge your sword. A Max Ammo drops as it re-enters.

Phase 2: it gets more mobile and gains a homing slam telegraphed by a red circle in your vision — sprint out of it. It also spreads lava pools that last fifteen to twenty seconds and are near-lethal to cross.

Phase 3: the arena shrinks to the middle and is ringed by constant lava, so stay off the edges. This is where the Mutant Injection goes — you are immune to zombies inside it and its cannon does serious damage to the face. Idle Eyes helps enormously. Enough chest and face damage kills it; pick up the amulet it drops to trigger the ending cutscene.