How to solve the Astra Malorum Easter Egg in CoD: Black Ops 7

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Call of Duty: Black Ops 7 Zombies takes players into outer space with its first post-launch map, Astra Malorum. This map features a Liberty Falls observatory situated on a giant floating skull orbiting Saturn. A guardian robot named O.S.C.A.R. patrols the area, making the Moon seem tame in comparison, as Moon had a giant pyramid with a girl inside.

If you choose to complete the Easter Egg, you’ll be transported to a temple on Mars’s surface. There, you’ll solve complex puzzles involving pianos and scarabs to defeat Caltheris and free the second Shadowsmith. I won’t spoil who they are because the final battle promises to be a spectacular show.

Step-By-Step Walkthrough

To start the Easter Egg, you first need the LGM-1 weapon. Check out our detailed guide on how to get it. Once you have it, follow these main steps:

1. Get the saw from the Museum Infinitium, located in the corner by the entrance near Speed Cola.
2. Follow O.S.C.A.R. from behind as he plays a recording of Thurston.
3. The three planets he mentions relate to their distance from the sun, with Earth being 3, for example. Convert Thurston’s recording into a code based on these numbers.
4. Enter this code into the Observatory Dome terminal.
5. Take the lift and interact with the corpse to retrieve the Cryo Chamber Key.
6. Use the key to open the cryopod south of Machina Astralis, revealing a body.
7. O.S.C.A.R. and a horde of zombies will spawn. Quickly saw off the head of the body to get its brain.
8. Find another brain in a container on a table in the Luminarium and swap it with Thurston’s.
9. Interact with Thurston’s brain to trigger a lockdown; defend it for 60 seconds from zombies.
10. Pick up the brain and take it to Machina Astralis. Place it in the machine next to the teleporter.
11. Head to the Observatory Dome and look through the telescope. Focus on Mars, then note the coordinates displayed.
12. Input these coordinates into the terminal on the second floor of Machina Astralis.
13. Reveal Thurston’s Reading List by interacting with his brain, then note the titles.
14. In the library, interact with three statue heads next to bookshelves. Each shelf displays different novels matching those on the reading list.
15. Count how many novels match and turn each related statue’s head accordingly at the start of a round.
16. If correct, a ladder will appear. Climb to get the model Neptune and place it in the planetarium.
17. Find the scattered notes detailing planets and directions, then align the planets in the planetarium accordingly, using the compass below the sun.
18. Return to the Observatory Dome, input the Martian coordinates on a terminal.
19. Solve the library puzzle by interacting with Thurston’s reading list, bookshelf displays, and statue heads.
20. Enter the sequence of symbols shown on the piano into the second-floor terminal.
21. Interact with the pillars in the puzzle room, matching the symbols in the correct order.
22. Once completed, engage the final pillar to trigger the boss fight.
23. Defeat Caltheris to finish the Easter Egg.

Retrieve The Saw

1. Head to the Museum Infinitium where Speed Cola is located.
2. Find the saw inside a display cabinet near the entrance.

Find Thurston’s Code

1. Follow O.S.C.A.R. undetected as he plays logs with planetary references.
2. Each planet mentioned has 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).
3. Write down the three planets’ numbers; if only three digits, prepend a zero if needed.
4. Input these into the second-floor terminal in Machina Astralis.

Solve the Library Puzzle

1. Interact with Thurston’s reading list in Machina Astralis to see which novels are listed.
2. In the Archive of Orbis, interact with bookshelves next to each statue head.
3. Count matching novels and turn each corresponding statue head that number of times at round start.
4. If correct, a ladder appears; ascend to retrieve the Neptune model.
5. Return to the planetarium and place Neptune in the missing pole.
6. Locate the notes that show planets and directions.
7. Shoot the planets in the correct order, aligning with the directions on the notes, guided by the compass.
8. Reactivate the portal, fighting UFOs during the lockdown until teleportation to Mars begins.

Find The Martian Code

1. On Mars, pick up Thurston’s brain on the central platform.
2. Return his brain to the machine overlooking the temple to reconnect the portal.
3. Observe the coordinates on the telescope, and input them into the second-floor terminal.
4. Interact with Thurston’s brain in Machina Astralis to display his reading list.
5. In the Archive of Orbis, interact with the statues, matching the number of novels on bookshelves to how many times to turn the statue heads in the start of a round.
6. Once completed, a ladder will drop. Climb to get the model Neptune.
7. Place Neptune on the pole in the Machina Astralis planetarium.
8. Find notes around the map that give planet directions.
9. Use the notes to shoot planets into the correct positions.
10. Reactivate the portal with another input, then shoot the pylons with the LGM-1 to activate them.
11. Adjust the planets in the Machina Astralis to match the symbols on the piano display.
12. Return to Mars and interact with the pillars, inputting symbols in the correct sequence.
13. Complete the sequence to activate the final pillar.

Defeat Caltheris

1. Thurston’s brain is used to trigger the last boss fight.
2. Caltheris cannot be harmed initially with normal weapons.
3. Instead, defend the towers on either side of the temple from periodic UFO attacks.
4. When charged, the screen flashes white, indicating that you can now fire a laser at Caltheris.
5. Repeat this three times to break her skull, revealing her true form.
6. In her final form, you can damage her with normal weapons once her shell is destroyed.
7. Deal enough damage to defeat her, completing the Easter Egg.

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