The Guyver: Bio-Booster Armor

The Guyver - Bio-Booster Armor
DVD cover of US release of Guyver
強殖装甲ガイバー (Kyōshoku Sōkō Gaibā)
Genre	Action, Science Fiction
Original video animation
Directed by	Koichi Ishiguro (1-6) Masahiro Ōtani (7-8) Naoto Hashimoto (9-12)
Written by	Riku Sanjo (1-6) Motonori Tachikawa (7-12)
Music by	Eiji Kawamura Reijiro Koroku
Studio	Animate Film
Released	1989 – 1992
Runtime	30 minutes each
Episodes	12 (List of episodes)

The Guyver: Bio-Booster Armor (強殖装甲ガイバー, Kyōshoku Sōkō Gaibā^?) is a 12 part anime OVA loosely based on Yoshiki Takaya's manga, Bio Booster Armor Guyver. It was released in Japan from 1989 to 1992. It is the second animated adaptation, following the 1986 OVA Guyver: Out of Control.

Divided into two series, this OVA series tells a condensed version of the first five volumes.

Though the series follows the manga much more closely than the original OVA, Guyver: Out of Control, there are still some significant differences between the manga and this OVA series. The main characters were included and the general feeling of manga plot are still there. The series of events that happen are where the major differences occur, as well as character appearances. An example was the appearance of Vamore; in the OVA he appeared immediately after Guyver I had defeated Gregole, in contrast to the manga where he appeared during the first kidnapping of Tetsuro. The Hyper Zoanoid Team 5 were also introduced much earlier than in the manga. In fact, an entire sequence of the team attacking Sho's school was added in as well as a battle between the two Guyvers and the team in the Chronos headquarters.

The OVA series was first released in the United States by U.S. Renditions in 1992. L.A. Hero, which released the first OVA, Guyver: Out of Control, provided the translation. It was released on 6 VHS tapes dubbed in English. All tapes had two episodes per tape with the first part of the series on the first three tapes and the second part on the last three tapes.

After U.S. Renditions rights expired, the series was later picked up by Manga Entertainment and released one episode per VHS. They later condensed the series onto two DVDs with each series on a separate DVD. The DVDs featured both English and Japanese audio tracks.