Welcome to your no-nonsense guide to the ASTRA Malorum Easter Egg. I’ll walk you through everything you need to know—from loadouts to boss strategies—so you can complete this Easter egg efficiently.

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Recommended Loadouts

The boss fight can last a while, so preparation is key. Here are my suggestions:
Gobble Gums: Consider using Cashback or Raindrops. Shields Up is also very helpful for protection during the fight.
Weapons: The Novaline, a kitted-out AK/AR, or LMGs are excellent choices. For armor-busting, the Ion Sniper is perfect—use it as a secondary weapon rather than your main.
Augments: Equip Deadshot Minor for extra damage to armor, and Double Tap/Double Caliber for added firepower.

Step 1: Power and Pack-a-Punch

Like all Easter eggs, start by activating Power and the Pack-a-Punch machine.
If you’re playing in Standard Mode, follow the on-screen prompts.
In Cursed Mode, the steps won’t be guided, so refer to a separate Pack-a-Punch tutorial if needed.
I recommend doing an early Pack-a-Punch to have a fully upgraded weapon ready for upcoming steps.

Step 2: Collecting Wonder Weapon Components

You’ll need four components to assemble the Wonder Weapon:
Old Tessy Car Battery: Shoot the front of the Tessy car with your Pack-a-Punched weapon to release the battery. Zombies will spawn, so stay alert.
Cryofreeze Shards: Apply the Cryofreeze ammo mod at an Arsenal machine, then shoot three purple crystals around the map to collect the shards.
Apparent Wires: Look for blinking street lights (multiple spawn points). Shoot the light to reveal the wires, which you can pick up.
UFO Disc: This comes from shooting the little UFOs that accompany the Oscar mini-boss.

Step 3: Steam Vents & Telescope Puzzle

In the Pack-a-Punch room:
Interact with the organ to play a sequence of tones.
Locate steaming vents around the room (walls, pillars, or balcony). Shoot them in sequence; steam will move from one vent to another.
After 6–7 successful vents, you’ll hear a cue and see the telescope move, signaling the next step.
Tip: If you fail, simply replay the organ sequence and try again.

Step 4: Oscar Mini-Boss Interactions

Oscar is essential for multiple Easter egg steps:

Sun Laser: Position Oscar through the telescope beam to explode him. Stagger him by shooting orbiting UFOs.
Luminarium Trap: Place collected components (Tessy battery, wires, UFO disc) into the trap and lure Oscar inside. Let it charge to defeat him.
Rocket Sequence: Use three collected shards at the museum rocket. Bring Oscar to the rocket’s back for a timed blast-off to defeat him.
Repeat with multiple Oscars until all Wonder Weapon parts are collected.

Step 5: Brain Sequence & Mars Puzzle

Wait for another Oscar to spawn (yellow light = not aggressive).
Follow him while listening to recorded dialogue for planet names (e.g., Venus, Jupiter, Neptune). Convert these into a three-digit code using their position from the Sun.
Enter the code into the device in the Pack-a-Punch room to unlock a Cryo Key.
Use the bone saw to extract a brain from a cryopod, then defend it during a 60-second lockdown sequence while zombies attack.
Place the brain into the Machina Astralis solar system room.

Step 6: Planet Alignment Puzzle

Install the Cryo Key planet into its slot.
Collect three notes with planets and cardinal directions from around the map.
Shoot the planets in the solar system room so they align with the directions indicated by the notes.
Defend the structure during the resulting lockdown while Oscar shoots UFOs. Completion will open a portal to Mars.

Step 7: Mars Low-Gravity Puzzle

Pick up Thirsten from a canister and place him into the device.
Look out for a small flying object outside the window and attract it by shooting the four pillars in sequence.
Use low gravity to jump and capture the object, then place it in the corresponding statue slot.

Step 8: Pillar Symbol Puzzle

Back on Earth, use the Pack-a-Punch organ to reveal a symbol sequence.
Match these symbols to the bases of the pillars on Mars using your Wonder Weapon.
Interact with pillars in the correct order to complete the puzzle. Three fails will require restarting in the next round.

Step 9: Boss Fight Strategy

Initial Phase: Charge the pillars with zombie souls, then fire lasers at the boss. Repeat for both towers.
Second Phase: Watch out for gas and lasers; move clockwise or counterclockwise as a team to avoid collisions.
Armor Phase: Destroy the boss’s armor using Shatter Blast, syntaxes, or equipment. Keep distance and avoid thrown projectiles.
Final Phase: You’ll receive a power-up granting infinite ammo and equipment. Maximize damage output, but avoid pools of electricity left by purple rocks.

With these steps, you should be able to complete the Astra Malorum Easter Egg efficiently, even in solo or co-op mode.