Act of Depression overall received mixed reviews.
Casey Boland of Alternative Press stated that the album sounds "hopelessly dated" by modern standards and that the songs are "complicated seemingly for the sake of being complicated." Boland wrote the album has "flashes of brilliance" but "doesn’t have the creative legs to stand the test of time." Boland concluded his review by saying "Despite its many flaws, Act Of Depression is a curious look at the humble beginnings of an influential band."
Track listing
On the 2013 re-release, "Spirit of a Living God" was removed, as well as the audio sample in the beginning of "Innocence Stolen".
Personnel
;Underoath
- Dallas Taylor – lead vocals
- Corey Steger – guitar, backing vocals, acoustic guitar and spoken commentary on "Spirit of a Living God"
- Octavio Fernandez – bass
- Aaron Gillespie – drums, backing vocals on "A Love So Pure", lead vocals on "Spirit of a Living God"
;Additional
- James Paul Wisner – producer
- Greg<!--credited only by first name--> – engineer
- Josh<!--credited only by first name--> – mastering
- Tim Baron – illustrations, cover art
- Ryan Clark – reissue art