On May 5, 2015, Six Feet Under released their eleventh studio album, Crypt of the Devil. On this release Chris Barnes incorporated Phil Hall, Josh Hall and Brandon Ellis from the band Cannabis Corpse for the studio line up.

In April 2015, Jeff Hughell had to step out from the Hatefest tour in Europe and Victor Brandt of Entombed had to fill in as a temporary bassist.

The band released their fourth cover album Graveyard Classics IV: The Number of the Priest on May 27, 2016 with Ray Suhy on guitar and bass and Josh Hall on drums, both from Cannabis Corpse, appearing on the album.

In 2016 longtime guitarist Steve Swanson left the band and was replaced by Cannabis Corpse member Ray Suhy.

The band will release their twelfth studio album in 2017. It will mark the debut for guitarist Ray Suhy and drummer Marco Pitruzzella, in addition Jeff Hughell will be recording guitar along with bass for the next album.

Chris formed Six Feet Under with the intention of writing death metal that wasn't simply about blast beats and speed. They play a more groove oriented style of death metal, performing slower, or more mid-tempo paced songs than most death metal acts. Barnes' lyrical style has changed little since his departure from Cannibal Corpse, though the lyrical content is not as shocking as that of his first band. Today, Chris writes about violence, gore and death, with some political leanings, such as the legality of marijuana and criticism of the government.