Some of these answers, while amazing albums, make me wonder if they are truly "debut" albums
Like Ozzy with Blizzard of Oz. Might be his first solo album but he had what a decade and 8 albums "practice" with Black Sabbath?
That is not Devin's first album, heck it is not even DTP's first album
His first album is technically Sex & Religion with Vai (Steve Vai's ill-fated attempt at a band )which was in 1993
His next studio album was with Strapping Young Lads in 1995 "Heave as a Really Heavy Thing"
Even using his own name as Devin Townsend or Devin Townsend Project, Ocean Machine was technically his 2nd album after "Cooked on Phonics" which was more of a joke album and you might find funny given you are from Poland right?
Punky Brüster – Cooked on Phonics is the debut studio album by Canadian musician Devin Townsend, originally released as Cooked on Phonics under the fictional band name Punky Brüster. It was released on Townsend's label, HevyDevy Records, on March 19, 1996. It is a comedic metal/punk rock concept album written by Townsend.
Cooked on Phonics tells the story of a fictitious death metal band "from South Central Poland" called Cryptic Coroner; during a gig, their guitarist breaks a string, and the band is forced to improvise and tune up to play punk rock instead; the band accidentally becomes an overnight success and decides to sell out their metal look and sound to become a commercial punk rock band called Punky Brüster (the band's name being a pun on the 1980s U.S. television series Punky Brewster).