In February 2017, Jeff Waters said that the sixteenth Annihilator studio album was being co-produced and co-engineered by bassist Rich Gray, making it the "first time I've actually had somebody else in the studio since 1990 ("Never, Neverland") working with me on stuff." On September 12, 2017, it was announced that the album, now titled "For the Demented", would be released on November 3; more details on the album, including track listing and artwork, and the music video for "Twisted Lobotomy" were released on the same day. In support of "For the Demented", Annihilator (along with Death Angel) opened for Testament on the European "Brotherhood of the Snake" tour, which took place in November and December 2017. The band toured Europe twice in 2018; first with Testament and Vader in March and April, and toured there again from October to December.