Warner Archive is now offering manufactured-on-demand DVD re-issues of The Guyver and The Guyver 2 (Guyver 2: Dark Hero) live-action films.
New Line Cinema released The Guyver directly to video in 1991 and the sequel in 1994.
Viz Media released part of the manga in English from 1995-1998, Manga Entertainment released the OVAs in North America, and ADV Films and later FUNimation Entertainment released the television anime.
The manga also inspired an OVA series from 1989-1992 and a television anime from 2005-2006.