Call of Duty: Black Ops 7 Zombies – Astra Malorum Easter Egg Guide Master the Outer Space Adventure and Defeat Caltheris Step by Step

🚀 Welcome to Astra Malorum

Call of Duty: Black Ops 7 Zombies takes players into orbit with the post-launch map Astra Malorum. Set in a Liberty Falls observatory resting on a colossal floating skull near Saturn, the map introduces the guardian automaton O.S.C.A.R.. The space setting outshines previous maps like Moon, with intricate Easter Egg challenges leading players to a Martian temple full of puzzles, scarabs, and an epic boss fight against Caltheris.

🛠 Step 1: Acquire the LGM-1 and The Saw

Before tackling the Easter Egg, ensure you have the LGM-1 Wonder Weapon. After that:

Head to the Museum Infinitium (near Speed Cola).
Locate the Saw in the display cabinet southwest by the Crash Site entrance.

🧩 Step 2: Find Thurston's Code

Follow O.S.C.A.R. without being detected.
Listen to the recordings he plays; Thurston will mention three planets.
Each planet corresponds to a number based on its distance from the Sun:
- Mercury: 1
- Venus: 2
- Earth: 3
- Mars: 4
- Jupiter: 5
- Saturn: 6
- Uranus: 7
- Neptune: 8
- Pluto: 9
Combine the numbers to form the code.
Input this code at the Observatory Dome terminal to lower the lift.

🔑 Step 3: Pick Up the Cryo Chamber Key

Jump onto the lift.
Interact with the corpse to collect the Cryo Chamber Key.

🧠 Step 4: Acquire Thurston's Brain

Go to the bar south of Machina Astralis.
Interact with the cryopod to reveal a body.
Quickly use the saw to remove the brain before O.S.C.A.R. and zombies arrive.
Swap it with another brain in the Luminarium container.

🛡 Step 5: Defend the Brain

Interact with Thurston’s brain to trigger a 60-second lockdown.
Defend it from zombies.
Once complete, pick up the brain and place it in the machine next to the teleporter pad in Machina Astralis.

🔭 Step 6: Discover the Martian Code

Head to the Observatory Dome telescope.
Center your crosshair on Mars and note the displayed coordinates.
Enter these coordinates into the terminal on Machina Astralis’ second floor.
This will unlock the next stage of the Easter Egg.

📚 Step 7: Solve the Library Puzzle

Interact with Thurston’s brain to view his Reading List.
In the Archive of Orbis, find three statue heads next to bookshelves.
Turn each head based on the number of books matching Thurston’s list.
If done correctly, a ladder appears; climb it to retrieve the Neptune model.
Place Neptune in the planetarium.

🪐 Step 8: Align Planetarium Planets

Collect three notes across Astra Malorum showing planets and cardinal directions.
- Desk in Machina Astralis
- Table in Archive of Orbis
- Table in Luminarium
Shoot planets in the planetarium to match the directions on the notes using the compass beneath the sun.

🌌 Step 9: Activate the Teleporter and Travel to Mars

Interact with Thurston’s brain to start the portal lockdown.
Destroy UFOs fired by O.S.C.A.R. during this phase.
Once the progress bar fills, teleport to Mars.

🪲 Step 10: Capture the Scarab

Pick up Thurston’s brain on Mars.
Place it in the machine overlooking the temple.
Rebuild the portal to spawn a scarab.
Shoot four pylons (furthest to nearest) to activate the scarab.
Grab it using low gravity and place it in the golden device in the southeast corner.

🏛 Step 11: Align Martian Pillars

Activate the five Martian temple pillars with the LGM-1.
Return to the Observatory Dome piano to note four flashing symbols.
Back on Mars, interact with the pillars in the symbol sequence.
Correct input shows blue; incorrect shows red. Repeat as needed.

⚔️ Step 12: Defeat Caltheris

Trigger the final boss fight with Thurston’s brain.
Caltheris is initially immune to conventional weapons.
Kill zombies near the two temple towers to charge a laser attack.
Repeat three times to destroy her skull, revealing Caltheris the Needle.
Damage her weak points to complete the Easter Egg.

🎮 Final Thoughts

The Astra Malorum Easter Egg is a thrilling journey through space and Martian temples, blending puzzles, combat, and strategic teamwork. From navigating O.S.C.A.R.’s patrols to mastering planetary alignments, completing this Easter Egg rewards players with one of the most cinematic experiences in Call of Duty Zombies history.