Clockwork Squared is the fifteenth soundtrack in the Call of Duty: Black Ops - Zombies Soundtrack. It is a soundtrack and level in Dead Ops Arcade. The song starts to play at the very beginning of the Clockwork Squares level, along with Raining Teddy Bears. It is available on iTunes or downloadable with Rezurrection.
The song can also be heard in the Data Vault in Call of Duty: Black Ops III by cycling through the songs on the music player and selecting this. As well, in the campaign and Nightmares mission "Vengeance", Clockwork Squared can be heard playing through the speaker of a television in one of the houses the player must travel through.