In 2005, Blythe worked with the metalcore outfit A Life Once Lost on their album "Hunter". He provided additional vocals on the track "Vulture" as well as helped in the vocal processing of the track. He later worked with them again in 2007 on "Iron Gag." He also appeared on the song "Skull and Bones" by the band Overkill and "Adoration for None" on Gojira's album The Way of All Flesh. He was also featured on Shadows Fall song, King of Nothing, on their 2009 release, Retribution. Blythe was featured in many of his peers' DVDs, such as Killswitch Engage's "(Set This) World Ablaze" and Machine Head's "Elegies". Blythe was also featured in "", "Working Class Rock Star" and Melissa Cross's "The Zen of Screaming".