Call of Duty Zombies Solvers & Interactive Tools
The hardest Zombies Easter egg steps are the puzzle steps — mahjong towers, ciphers, murder deductions, symbol sequences and codes. These 41 free interactive solvers do the working-out for you, live in your own match, with nothing to download. Each one is built into its map's full walkthrough, so opening a tool also drops you into the steps around it.
Black Ops 2 2012
Mahjong Tower Order Solver
Colour links a Wind tile (a corner) to a number tile (its position).
In-game: Die Rise — radio tower
Pigpen Cipher Decoder
These all use the classic pigpen (tic-tac-toe) alphabet.
In-game: Ashes rocket launch / Yuri's Lab / Buried mine signs
Black Ops 3 2015
Gorod Krovi Valve Route Planner
Both the green-lit start valve and the whistling valve holding the pink code cylinder are randomised each match.
In-game: Gorod Krovi — six valve chambers
Infinite Warfare 2016
Morse Code Decoder
Tap in the dots and dashes you hear, using ▮ between letters — it decodes live.
In-game: Shaolin phone · Beast Venom consoles · Shadowed Throne Nazi Axe
Open on Shaolin Shuffle →Open on The Beast from Beyond →Open on The Shadowed Throne →
Rooftop Cipher Key
The Disco Inferno rooftop wall paints six glyphs from a fixed A–Z cipher; you spell one map-themed word by shooting them in order.
In-game: Shaolin Shuffle — Disco Inferno roof
Chemical Formula Calculator
Do Elvira's colour step first so you're reading the right boards.
In-game: Radioactive Thing — Gas Station
Black Ops 4 2018
Apothicon Riddle Decoder
The Apothicon Blood asks for three offerings and states each as a phrase like “Where lungs close”.
In-game: Tag der Toten — the three offerings, after the Artifact Storage dials
Black Ops Cold War 2020
D.I.E. element → port colour
Fire each upgraded D.I.E. variant into the matching coloured corner of the hanging chamber above Speed Cola; the fuse flips up when you hit the right one. Fire is RED — the corner ne…
In-game: Medical Bay test chamber (charge the four ports)
Firebase Z Dartboard — shot planner
The Weapon Lab computer flashes a wheel whose lit segment stops in three positions; those positions map onto the standard dartboard in the Village.
In-game: Weapon Lab computer → Village dartboard
Aetherium canister — smoke check
When you dig the Open Lot canister, identical-looking decoys spawn all around it.
In-game: Open Lot dig (RAI K-84 build)
Satellite target — pick the “?”
On the satellite screen the decoy satellites carry a US or USSR flag — never select those.
In-game: Planning Office computer (before Orda)
Missile silo launch order
Each launch console (Silos A, B, D) shows a row of three lights — two red, one green.
In-game: Ruka silo control rooms (Legion finale)
Valentina — attacks & counters
Valentina carries a blue shield over red health: break the shield before any health damage counts, and it comes back at each health checkpoint or if you stop shooting.
In-game: Tin Man Heart boss fight
The Forsaken — armour order & cannons
It only takes health damage once its armour is stripped.
In-game: Containment Zone boss fight
Black Ops 6 2024
Terminus Code Solver
The three-part code is different in every game, and the usual advice is to give Dr.
In-game: Research Office — the computer with the X, Y and Z sticky notes
Raven Rune Wheel
After forging the Raven Bastard Sword, exactly one animal-bone trophy spawns in the Alchemical Lab.
In-game: Tavern Cellar — rune wheel
Shattered Veil Protocol Code Solver
Type the four-letter protocol the fax printed (CRAB / WORM / MOTH / YETI) and the six chalkboard letter-groups.
In-game: Shattered Veil — Nursery chalkboard
Folder Chronology Code
Four dated folders spawn from a random pool.
In-game: Teleportation Lab computer
Element Atomic-Number Code
The two static screens flash a word each; take the first letter of each to form a chemical element's symbol (one screen may give only one letter).
In-game: T1 Mutant Research — vat keypad
Black Ops 7 2025
Serum Symbol Matcher
Interact with the Powder of the Forgotten (5th bowl) and three pigpen words appear on the chalkboard — top, middle and bottom, a different set each game.
In-game: Yuri's Lab — Zarya Cosmodrome
Necrofluid Gauntlet Symbols
On the jump-pad flight over Vandorn Farm, three red symbols appear on the rooftops — one for each cube face.
In-game: Aether Barrel cube — red eye
Planet Code Calculator
Thurston's recording names three planets. Pick them in the order spoken — each converts to its order from the Sun (Mercury 1 … Neptune 8) and the code updates live (each number is 2…
In-game: Observatory Dome keypad
Mars Symbols Order Tracker
The five symbols appear one way on the Observatory Oculus (the gold discs you tap here) and a different way on the Mars pillars (the line versions shown in the result).
In-game: Observatory Oculus → Mars pillars
Planet Directions Summary
Set the compass direction shown for each planet in-game — they collect here so you can read all three at a glance instead of flicking between them.
In-game: Mars — compass step
O.S.C.A.R. Audio-Log Stopwatch
The trailing audio log plays for roughly 90–120 seconds.
In-game: Elimination Twenty challenge
Statue / Book Puzzle Solver
Dr. Thurston's reading list flashes some book titles. Tick the ones that appeared — each book belongs to a fixed statue, so the solver counts them and tells you how many times to tur…
In-game: Archive of Orbis
Mars Declination Code
Point the telescope at Mars and read the DEC value bottom-left (degrees and arcminutes).
In-game: Telescope → Machina Astralis
Piano Melody Trainer
The notes are the same every match, so the difficulty is not knowing them — it is playing them cleanly while a horde closes in, because a fumble resets the whole thing.
In-game: Green House piano — Clean Nuketown
Genetic Lab Jar Solver
In the south corridor, two of the five numbered doors (1–5) have a radiation symbol.
In-game: Group 935 Genetic Lab — Fishery Island
Console Tuning Helper
Count how many times the lights blink inside Tyr's head.
In-game: Tyr's Head → consoles
Flak Gun Crate Helper
The Cargo Manifest in the War Factory Admin Room marks which crate holds the PZGR .39 (the Flak Gun Round).
In-game: War Factory manifest → 4 crates
Claw Machine / Atomkraft Core — how it works
This step is a randomised circuit puzzle, so there's no fixed answer to look up — but the rule is simple once you see it.
In-game: Machine Workshop
Fireplace Rune Order Tracker
When the rune circle rises, arrows point to specific runes.
In-game: Rune circle
Scroll Puzzle Solver (3×3)
Toggle each scroll between out and in — hitting one flips it and its up/down/left/right neighbours.
In-game: Storage Rooms — south wall
Clock & Flag Combination Solver
Enter the four clock numbers in order and how many banners of each symbol-count you have.
In-game: Storage Rooms clock → Staging Area flags
Murder Case Solver
Pick the clues from the ghost Rifleman, the Court Doctor's Record, and the fourth painting — the item for each painting and the zodiac dial setting update live below.
In-game: Meditation Room
Her House Piano Trainer
Paradox Junction's melody with one extra note on the end.
In-game: Her House — the piano, before you answer the phone
Dravakar Pillar Riddle Solver
Melee the blue writing in Dravakar Sanctuary to hear your riddle, then pick the line you heard.
In-game: Dravakar Sanctuary — the four rotating pillars
Cube Wall — guided move sequencer
The transfer is a river-crossing puzzle, and the working sequence is the same in every game — what people lose is their place in it, halfway through, with no way to tell what they ha…
In-game: Veytharion — the four-cube wall (a required quest stage)
House Symbol Order Tracker
The four symbols appear on Her House one per round, in a random place each match — there is no fixed list to look up.
In-game: Her House — the four blue symbols (Part C)
Monolith Crank Sequencer
The three rings are randomised per match, so there is no fixed answer to copy.
In-game: Nexus Forge — the three rotating pillars
Unofficial fan project. Not affiliated with, endorsed by, or sponsored by Activision Publishing, Inc. or any of its game studios. “Call of Duty” and all related marks are trademarks of their respective owners. Compiled from public community walkthroughs (GameRant, the Call of Duty Wiki, GameFront and others); some maps use official Call of Duty imagery.
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