is a Japanese video game developer based in Hino, Tokyo. It was founded on April 1, 1990 by composer Yuzo Koshiro, Ayano Koshiro, and Tomo Koshiro. The company is best known for its work on Streets of Rage 2, Beyond Oasis, the Protect Me Knight/Gotta Protectors series, and the 8-bit version of Sonic the Hedgehog.
Overview The company was founded when Yuzo, who had worked on the sound for The Super Shinobi, received an inquiry from Sega asking if he could create an entire game. Yuzo was told that taking on the entire game would require a company-wide deal, so he founded the company. Initially, he invited Shinobu Hayashi, an acquaintance from a doujin PC software circle (who later worked on the development of Decathreat at Sega and joined Zenaworks after leaving Sega), to work as a programmer, and formed the company with Ayano, who was in charge of graphics, and four high school classmates. The company was run as a cottage industry (the company's representative was the mother of the Koshiro siblings). The Game Gear version of Sonic the Hedgehog that they developed became a huge hit, and the profits were used to build the company's headquarters.
Games + List of games developed by AncientYearTitlePublisherPlatform1991Sonic the Hedgehog SegaMaster System, Game Gear1992Streets of Rage 2Genesis1993ActRaiser 2EnixSuper NES1994Beyond Oasis SegaGenesis 1996The Legend of Oasis SaturnVatlvaJVC1997Sega Ages: Columns Arcade CollectionSega1998Sega Saturn de Hakken!! Tamagotchi ParkBandai1999Animetic Story Game 1: Cardcaptor SakuraArikaPlayStation2001Car Battler Joe Natsume Inc.Game Boy Advance 2004Amazing IslandSegaGameCubeBobobo-bo Bo-bobo Atsumare!! Taikan Bo-boboHudson Soft PlayStation 2 2006Ueki no Hōsoku: Taosu ze Roberuto Jūdan!!BandaiBleach: Hanatareshi YabouSony Computer Entertainment 2007Fuzion Frenzy 2Microsoft Game StudiosXbox 360Katekyoo Hitman Reborn! Dream Hyper Battle! Marvelous EntertainmentPlayStation 22008Katekyoo Hitman Reborn! Battle Arena PlayStation Portable2009Katekyoo Hitman Reborn! Battle Arena 2 2010Protect Me Knight Self-publishedXbox 360Puchi Puchi TimeiOS2014Gotta ProtectorsNintendo 3DS2017Gotta Protectors: Amazon's Running DietNintendo Entertainment System2019Gotta Protectors: Cart of Darkness8-4 Nintendo Switch2021Royal Anapoko AcademySelf-published2025EarthionLimited Run GamesGenesis, Windows, Switch, PlayStation 4, PlayStation 5, Xbox Series X/S
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