We're turning 20, and we're celebrating in a big way. On August 31 at the Brooklyn Bowl in Philadelphia, we've got Autopsy's first Philadelphia show ever (!); Immolation will perform a special “First 20 Years” set in honor of the magazine’s 20-year run; progressive death dealers Horrendous celebrate the 10th anniversary of their Ecdysis release with a special full-album performance; epic doom-bringers Crypt Sermon will perform their new record, The Stygian Rose, in its entirety; U.S. black metal progenitors Krieg will manifest ritual horror, Deathevokation will raise a chalice to old-school death metal; and Philly powerhouse grunge gods Rid of Me round out the bill.