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Caltheris in her human form on Mars, leaning on her staff, ending cutscene, Astra Malorum, Call of Duty Black Ops 7 Zombies

Astra Malorum:
Main Quest

The main quest of Astra Malorum step by step: O.S.C.A.R.’s planet code, Thurston’s brain and the Perfusion Machine, the reading list and the orrery, the teleporter to Mars, the Ascendant Eye, the pillars, and the four forms of Caltheris.

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Before the quest

The main quest of Astra Malorum takes the crew from the observatory to Mars to free Caltheris. It needs the power, the Pack-a-Punch and the LGM-1, whose build is the first step. Many steps can be done side by side.

Step 1: building the LGM-1

Eavesdropping on O.S.C.A.R.

  1. From round 10, find O.S.C.A.R. and follow it 15 to 30 metres behind, without being seen. It recites reports of its old missions.
  2. Wait for the report that names three planets in a row, and turn each into its rank from the Sun: Mercury 1, Venus 2, and so on. Earth, Mercury, Mars gives 314. Subtitles help.
  3. Enter the three digits on the terminal of the Observatory Dome: a lift opens to the left of the Pack-a-Punch.

The brain in the Perfusion Machine

  1. Take the key from the body in the lift.
  2. In the Museum Infinitum, shoot the glass of a display and take the rock saw.
  3. In Machina Astralis, open the cryopod: it holds the body of Silas Thurston. Take his brain.
  4. In the Luminarium, put it in the Perfusion Machine in place of a monkey brain, and defend the machine during a short lockdown.
  5. Carry the machine to the device beside the teleporter of Machina Astralis, install it and switch it on.

The teleporter to Mars

Thurston’s reading list

A monitor flashes book titles. In the Archive of Orbis, turn each of three busts once for every title of the list on its own bookshelves, all three within 15 seconds. A ceiling tile opens above a ladder: take the Neptune model and place it in the orrery at the top of Machina Astralis.

The orrery

Three notes, in the Luminarium, Machina Astralis and the Archive of Orbis, each pair a planet with a direction. Shoot the planets of the model to turn each one to its direction.

The coordinates

In the Observatory Dome, look through the telescope, turned to space during the LGM-1 step, find Mars and note its four-digit code. Enter it in Machina Astralis.

The reboot

Restart the portal and hold it while O.S.C.A.R. attacks: the crew is sent to Mars.

On Mars

  1. Place the brain jar in the Aegis Terminal at the top of the stairs: it opens a portal home.
  2. Play the sound of the terminal, once per round, to make the Ascendant Eye fly around the giant head outside the temple.
  3. While it flies, shoot the four pylons outside the map, back right, back left, front right, front left, then the pylon above the terminal. The Eye comes down: jump into it to catch it, and set it in the device on the right side of the arena.
  4. With the LGM-1, shoot the antennas of the five pillars of the arena; each plays a note and shows a symbol.
  5. At the organ of the Observatory Dome, read the order of the symbols, one of them missing, and play the pillars of Mars in that order.
  6. Use the Aegis Terminal to start the fight.

The boss: Caltheris

The Skull

A floating skull of rock that fires lasers, then throws meteors and fills the arena with toxic gas. The souls of the zombies fill the towers on the walls; each full tower fires a laser into her from the machine at the top of the stairs, three times.

The Golem

A rock giant that slaps and throws rocks; a glowing weak spot opens on her chest or shoulder.

Caltheris Ascendant

After a wave of Armored Zombies, the golem again, faster and armored, with a ground slam that only a jump avoids.

The Needle

The last form, fast and brutal; her rocks leave pools of electricity. A team that finished the quest of Ashes of the Damned finds Veytharion’s Blessing at the top of the stairs: infinite ammunition and lethals for a while.

Shock Mimics come through the whole fight. An Armor wall-buy stands by the entrance of the arena and an Ammo Cache against a pillar on the left.

The ending

Caltheris in her human form on Mars, leaning on her staff, ending cutscene, Astra Malorum, Call of Duty Black Ops 7 Zombies

Caltheris restored

Freed, she gives Nikolai and Grey back their souls. Then the Warden finds them, takes the Entity, and his Ravagers drag the crew under the ground; Caltheris escapes.

Back to the observatory

A team that keeps playing returns with every perk, Legendary weapons, Salvage, Aether tools and a wonder weapon around it.

RewardHow
Astra Malorum Standard Completion calling card, Astra Malorum, Call of Duty Black Ops 7 ZombiesStandard Completion calling card, the Bottled Up skin for Nikolai and 10,000 XPFinish the quest in Standard mode.
Astra Malorum Early Completion calling card, Astra Malorum, Call of Duty Black Ops 7 ZombiesEarly Completion calling cardFinish it before Directed Mode came out, on January 8, 2026.
Astra Malorum Directed Mode Completion calling card, Astra Malorum, Call of Duty Black Ops 7 ZombiesDirected Mode Completion calling card, the Cosmic Repair skin for Grey and 5,000 XPFinish it in Directed Mode.
Lament calling card, Astra Malorum, Call of Duty Black Ops 7 ZombiesLament calling cardFinish it in Cursed, Tier III.
Crystalline, Void and Amethyst Fracture Pack-a-Punch camosFinish it in Cursed, Tiers I, II and III.