Edited:
This page is part of IGN’s Call of Duty: Black Ops Cold War Wiki Guide and contains everything you need to know about finding the three cassette tapes needed to unlock the hidden Easter egg song in Firebase Z.
How to find the Easter egg case tapes in Firebase Z
Below is a step-by-step guide to finding each of the three cassette tapes needed to unlock the Easter song.
Cassette tape one
To get things started, find the first cassette tape in the Village area.
This band is located on the second floor, just above the Pack-a-Punch area, in the Scientist Quarters. The tape can be found sitting on a bookshelf, not too far from the stairs.
Cassette tape two
Across from the courtyard is the second cassette tape in the storage of equipment. You will find the cassette tape on the bookshelf, directly next to the box you open to obtain the serum during the main Firebase Z Easter Egg.
Cassette tape three
The third and last cassette tape can be found after the teleporter has been used.This cassette is quite tricky to find. If you explore the right corner of the Motor Pool Office, you will find the adhesive tape on the floor between a cream-colored desk and a green subject cabinet.
After you have collected all three cassette tapes, the Easter egg song will automatically start playing.