Zombies mode is renowned for its intricate Easter eggs and hidden secrets. Each map features a main Easter egg quest that, when completed, reveals significant lore and often provides a cinematic ending. These quests are typically multi-step, complex puzzles that require teamwork and knowledge of the map's mechanics.

Die Maschine Main Easter Egg
- Step 1: Turn on Power & Pack-a-Punch: Standard initial steps for any Zombies map.
- Step 2: Activate the Anomaly: Interact with the Dark Aether Anomaly.
- Step 3: Build the Aetherscope: Collect three Aetherscope parts and assemble it.
- Step 4: Gather Diary Pages: Use the Aetherscope to find and interact with spectral anomalies to collect diary pages.
- Step 5: Decipher the Password: Use the diary pages to decipher a password for the computer.
- Step 6: Upgrade the D.I.E. Shockwave: Obtain the D.I.E. Shockwave wonder weapon and upgrade it with elemental variants (Nova 5, Electrobolt, Cryo-Emitter, Thermophasic).
- Step 7: Activate the Decontamination Agent: Follow specific steps to create and activate the decontamination agent.
- Step 8: Final Boss Fight: Confront the final boss, Orlov, and escape.
Beyond the main quest, look for smaller secrets like free perks, hidden music Easter eggs (by shooting specific objects), and unique weapon upgrades. Many guides exist online for detailed step-by-step instructions for each map's main Easter egg, as they are often too complex to fully detail here. The key is communication with your team and patience.
Compare zombies easter eggs & secrets inCall of Duty: Modern Warfare II (2022)