Amidst the Grave's Demons is a fictitious metalcore band from Columbus, Ohio, parodying bands such as Memphis May Fire, We Came as Romans, The Color Morale, and Of Mice & Men, among many others. The band performs five of the album's tracks: "The Swimmer", "Save My Life", "Misogyneric", "I'm So Scene 2.0", and "Hey Jarrod, What's That Song Again?", in addition to one track on the album's deluxe reissue, "Suck my 401k."
The majority of the vocals for the band were performed by Mike Martenson of the band Boys of Fall. He screams on all of Amidst the Grave's Demons' songs, and sings on all of them aside from "Misogyneric". Chris Linck of Attila performs a guitar solo on "Suck My 401k."
Johnny Franck (formerly of Attack Attack!) performs clean vocals on "I'm So Scene 2.0", and Mattie Montgomery of For Today performs some vocals on "Misogyneric."
Amidst the Grave's Demons was the first band to be created by Jarrod Alonge, and one of the two bands to release original music before the album's conception (the other being Sunrise Skater Kids). The band was first conceived in July 2013 in Jarrod Alonge's "Every Metalcore Vocalist" video, before releasing two songs in late 2013 and 2014: a demo version of "I'm So Scene" and a 10-hour instrumental breakdown loop titled "Eternity (Literally)". "I'm So Scene" featured unclean vocals by YouTuber Sky Sevart, and was composed by Alonge and his friends Benjamin Fleet and Blake Feagans, who used to play in a band called Ukulele and the Sock Monkeys.] Alonge produced both tracks.
On June 1, 2016, Alonge announced that Amidst the Grave's Demons would be releasing a five-song EP later in the month, featuring four band-specific parodies and an acoustic version of a track from Beating a Dead Horse. On June 6, the EP's title, Space Zombies was revealed, as well as an official tracklist.