In September 2018, Avenged Sevenfold released a four-track EP linked to the release of the Call of Duty Black Ops 4
video game. Having been featured in all three of the Black Ops releases previously, it was a no-brainer for the game-developing company Treyarch to get them involved in a new installment.
The EP contains a completely new song, "Mad Hatter," written for Black Ops 4
, plus the other three tracks the band has written and recorded for the Call Of Duty: Black Ops
franchise: "Not Ready to Die
," "Carry On
" and "Jade Helm