In their desperate search for another Shadowsmith, the Zombies crew find themselves stranded on an abandoned observatory that drifts silently within Saturn's orbit. In order to survive, the crew must fight off waves of Zombies, all while trying to piece together the hidden secrets that lie within Astra Malorum, before they can confront the dark presence that lurks within the ancient monument.
This guide provides a complete walkthrough for every step in the main Astra Malorum Zombies Easter Egg and details on how to pack-a-punch and obtain the LGM-1 Wonder Weapon, which is a crucial Wonder Weapon needed to solve this BO7 Zombies Easter Egg.
Before starting, it's recommended to turn Subtitles On, as you'll need to recall spoken planet names to complete a particular step. If there's a lot of noise, these names may be missed.
Step 1: Restore Power to the Harmonuc Oculus and Unlock the Pack-a-Punch Machine
- Repair the Harmonic Oculus: Find two missing components. The first can be found inside The Luminarium, and the second within Machina Astralis.
- Defend the Harmonic Oculus and Unlock the Pack-a-Punch Machine: Turn on the power by interacting with the Harmonic Oculus, initiating a lockdown sequence. Defend the machine from Zombies for 45 seconds.
Step 2: Obtain the LGM-1 Wonder Weapon
- Obtain the Damaged Drone: Locate O.S.C.A.R., a mini boss, and destroy one of his UFO drones to get the Damaged Drone.
- Obtain the Car Battery: Shoot Ol' Tessie's hood at the Crash Site to get the Car Battery.
- Obtain the Absolute Zero Fragments: Purchase and equip the Cyro Freeze Ammo Mod, then shoot three glowing purple crystals to get the fragments.
- Obtain the Aberrant Wiring: Find a blinking lightpost and shoot it with a Pack-a-Punched weapon.
Step 3: Solve Thurston's Planet Code and Obtain the Key
- Follow O.S.C.A.R. and listen to the recordings from Dr. Thurston, noting the planet names and their order.
- Use the planet names to create a unique three-digit code (e.g., Jupiter, Earth, Mars = 534).
- Enter the code into a device near the southern door in the Observatory Dome to get the Cryo Chamber Key.
Step 4: Obtain Thurston's Brain and Survive the Lockdown
- Obtain a Saw to open Thurston's skull. Break the glass window in the Museum Infinitum and interact with the Rock Saw.
- Find Thurston's Cryo Chamber, interact with it, and obtain his Brain.
- Replace Thurston's Brain in a machine at The Luminarium to start a 60-second lockdown. Defend the machine from Zombies.
Step 5: Power Up the Machine in Machina Astralis
- Transport the blue device to the center of Machina Astralis and place it into an empty device.
- Hold interact to connect the Perfusion Machine to the device.
Step 6: Solve the Book and Statue Puzzle in Archive of Orbis
- Note down the five book names flashing on the screen.
- Access the Archive of Orbis and solve the puzzle by interacting with the statues based on the book counts on each wall.
- Climb up to obtain the Planet Neptune.
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