Opera House
From Game Developer Research Institute
Established in 1989. [1] Possibly built upon the programming partnership of Satoru Miki and Hiroyuki Fujiwara.
FM Towns
- Advanced Dungeons & Dragons: Heroes of the Lance (JP Publisher: Pony Canyon)
Game Boy
- Bubble Ghost (JP Publisher: Pony Canyon, US Publisher: FCI)
Game Gear
- Side Pocket (Under subcontract from ISCO) (US Publisher: Data East)
Mega CD
- Advanced Dungeons & Dragons: Eye of the Beholder (JP Publisher: Pony Canyon, US/EU Publisher: Sega)
Mega Drive/Game Gear
- Captain America and the Avengers (Under subcontract from ISCO) (US Publisher: Data East, EU Publisher: Sega, BR Publisher: Tec Toy)
- Master of Monsters (Under subcontract from ISCO) (JP Publisher: Toshiba EMI, US Publisher: Renovation)
- Midnight Resistance (Under subcontract from ISCO) (JP Publisher: Data East, US Publisher: Sega)
- Verytex (Under subcontract from ISCO) (JP Publisher: Asmik)
MSX
- Advanced Dungeons & Dragons: Heroes of the Lance (JP Publisher: Pony Canyon)
NES
- Break Time: The National Pool Tour (US Publisher: FCI)
PC Engine/TurboGrafx-16
- Shin Megami Tensei (Under subcontract from ISCO) (JP Publisher: Atlus)
Super Famicom/NES
- Classic Road (Under subcontract from ISCO) (JP Publisher: Victor)
- Classic Road II: Real Kouma Simulation (Under subcontract from ISCO) (JP Publisher: Victor)
- Kyuuyaku Megami Tensei (Under subcontract from ISCO) (JP Publisher: Victor)
- Super Hockey '94 (Under subcontract from ISCO) (JP Publisher: Party Room 21)