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How to Unlock the Citadelle des Morts Song Easter Egg in Black Ops 6 Zombies

Interact with the three Mr. Peeks headphone sets in the Tavern, courtyard and catacombs/Undercroft to play “Slave” on Citadelle des Morts.
WorldBlack Ops 6 Zombies Length1 min Posted Quest giverVGSources Team

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Interact with all three Mr. Peeks headphone sets on the Citadelle des Morts map in Call of Duty: Black Ops 6 Zombies. The third interaction starts “Slave,” by Kevin Sherwood featuring Vicky Psarakis. The sets are in the Tavern, courtyard and catacombs/Undercroft area.

Where to find all three headphone sets

Look for Mr. Peeks headphones and interact with each set. The sequence is the same across the three locations; you need all three interactions for the song to play.

  1. Tavern, near spawn: Find the headphones on a table inside the Tavern.
  2. Courtyard: Look on the left side of the courtyard, near a trap.
  3. Catacombs/Undercroft: In the catacombs area, enter the room with a burned body and look beyond a couch for the final set. Some guides refer to this area as the Undercroft or Oubliette.

Interact with the third set to complete the sequence and start the track. The Escapist’s December 5, 2024 walkthrough describes the placements as the Tavern, courtyard and catacombs; the Zombies Codex Citadelle des Morts guide uses Tavern, Courtyard and Undercroft/Oubliette terminology. These names point players toward the same final area, not separate headphone locations.

What song does the Easter egg play?

The reward is “Slave,” credited to Kevin Sherwood featuring Vicky Psarakis. The Apple Music listing for the Citadelle des Morts original soundtrack is dated December 6, 2024, and credits Brian Tuey, Kevin Sherwood and James McCawley for the album. It lists the release as a 2024 Activision release.

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The listed album contains 22 tracks and has a total duration of 47 minutes; those figures describe the soundtrack release, not the Easter egg or its gameplay.

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