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Main Quest · Ascension

Casimir Mechanism

Ascension’s Casimir Mechanism is where the main quest was invented — the first multi-step group Easter egg in Treyarch Zombies. From round one Gersch pleads through the speakers to be freed from the mechanism before "she" arrives; five repair nodes later, a black hole fed with wonder-weapon fire lets him out. It strictly requires four players (one node needs four buttons pressed in the same instant) and, unusually, awards no achievement — the reward is ninety seconds of Death Machines and a debt repaid later in the story.

Difficulty: ModerateSpoilers: medium
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Still from “Call of Duty: Black Ops - Ascension Trailer [Official HD]”
Ascension · Call of Duty via YouTubeOpen route diagram

Preparation

Before you start

Prerequisites

  • • Power on and the rocket launched (Pack-a-Punch open)
  • • A Gersch Device and Matryoshka Dolls from the Mystery Box
  • • The Zeus Cannon and Porter’s X2 Ray Gun for the final node
  • • Four players — node two cannot be done with fewer

Walkthrough

Step by step

  1. 01

    Node one: sacrifice a Gersch

    Throw a Gersch Device onto the sparking generator out of bounds near the PhD Flopper lander, then hold use on the terminal screen at the Stamin-Up lander station.

  2. 02

    Node two: four buttons at once

    During a Space Monkey round, press the four red buttons that emerge near Jugger-Nog, PhD Flopper, Speed Cola and Stamin-Up — all four at the same moment.

    Warning: This is the step that hard-requires four players.

  3. 03

    Node three: hold the plate

    Everyone stands on the pressure plate by the wall clock in the room near Pack-a-Punch for a continuous two minutes, until the blast marks completion.

  4. 04

    Node four: spell LUNA

    Ride the lunar landers and collect the letters floating in the air mid-flight until they spell LUNA.

    Tip: Spawn to Stamin-Up, back to spawn, spawn to Speed Cola, then Speed Cola to Stamin-Up covers all four letters.

  5. 05

    Node five: feed the black hole

    Throw a Gersch Device onto the small glowing orb by the mechanism and pour in Zeus Cannon shots, Porter’s X2 Ray Gun fire and Matryoshka Dolls.

  6. 06

    Gersch goes free

    The orb rises and Gersch escapes — Death Machines for everyone as Samantha screams, and colour drains for a heartbeat before the game goes on.

    Freed, Gersch sends the crew onward through the rift toward Call of the Dead, and resurfaces much later in the story.

Following along in-game? Switch to Guided Mode for one step at a time on a screen you can read at arm's length.

Answers

Frequently asked questions

Does the Casimir Mechanism have an achievement?

No. First Strike’s Ascension achievements cover the landers, the Gersch Device, early Pack-a-Punch and the fire trap — completing the quest itself awards nothing beyond the Death Machines and the story.

References

  1. 1.Casimir Mechanism — Call of Duty Wiki — Call of Duty Wiki (Fandom). callofduty.fandom.com · accessed Jul 22, 2026Community-verifiedcorroborate
  2. 2.Ascension Easter Egg Guide — mmmrkennedy — mmmrkennedy (community guide). mmmrkennedy.com · accessed Jul 22, 2026Community-verifiedcorroborate

Last reviewed Jul 15, 2026. Spotted an error? Suggest a correction.