WTF is a musical easter egg in the Call of Duty: World at War Zombies map Nacht der Untoten. It can be heard by activating the radio in the "Help" room, via damaging it (shooting or knifing it) until the song plays. The song also plays during the loading screen for Nacht der Untoten in Call of Duty: Black Ops, and is available in the Music Player feature in Call of Duty: Black Ops Cold War.
The song obtained its name (short for "what the fuck") due to the song ending up as a unique mash of different genres after starting as an unfinished progressive trance song.
- Description - https://www.youtube.com/watch?v=IT57qmKyRPk