Avenged Sevenfold have released their long-awaited new song, "Mad Hatter," which was written for the latest Call of Duty game, Black Ops 4. A handful of internet sleuths uncovered Avenged's plans to release an EP last week. The EP, Black Reign, will be out on October 12, and will compile all four songs they have written for Call of Duty, including "Mad Hatter."

Fans on Reddit and Twitter dug up the information in the digital issue of Kerrang!, which contains an interview with frontman M. Shadows. Speaking on the new track, he said, "The song is dark and brooding. We wanted to capture a different feeling than a straight-ahead 'zombie killer' track. These songs are good places for us to experiment with our sound. I would put this in the category of 'dark alternative.'"

Avenged recently teased the song in a new video that recapped their European festival run earlier this year. The band announced they were working on a song for the video game in May. Bassist Johnny Christ said they had written it and were in the middle of the recording process at that time. He claimed the track is "a little bit of a departure from what I think our fans would expect."

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