Dr. Chaos: Jigoku no Tobira / ドクター・カオス 地獄の扉 (FDS - 1987, NES - 1988)
Cover art (Source: featured on the artist's website)
Gulkave / ガルケーブ (MSX - 1986)
Cover art (Source: featured on the artist's website)
Zanac / ザナック (MSX, FDS - 1986, NES, MSX2 - 1987)
Cover art (Source: featured on the artist's website)
Dr. Chaos: Jigoku no Tobira
Gulkave
Zanac