Call of Duty: Black Ops Cold War’s Zombies mode is another rendition of Treyarch’s beloved undead horde mode. While there are plenty of changes this time around, many classic aspects of the mode have returned with weapon upgrades, Perk-a-Colas, and an Easter egg to be found.
Zombie maps also usually have a secret song that you can activate. In the past, you could achieve this by interacting with three teddy bears hidden around the map. This time, you need to pick up three cassette tapes. You will know you did this correctly when the tape disappears in front of you. Here are the three tape locations in Die Maschine in Black Ops Cold War.
The first tape is found in the Living Room (the room with the D.I.E. Shockwave). You can find a fridge on the left side of the room with the Shockwave in it. The tape is inside there.
The second tape is in the Med Bay, otherwise known as the room with Speed Cola. To find it, you need to be in the side room above the Speed Cola machine. Go to the barrier on the right of the room, and on a shelf directly to the left is the tape you need to pick up.
The final tape is found in the Particular Accelerator (the room with the Pack-a-Punch machine). To find it, go to the room’s bottom floor and find the crafting table below and behind the PaP machine. While staring at it, turn to your right and go behind the wall in front of you. The tape is hanging off the top of the machinery. Upon picking up the final tape, the song “Alone” by Kevin Sherwood begins to play.