The vertical scrolling shoot-em-up arrived in arcades in Japan in October of 2005. Developer G.rev utilized the Sega NAOMI hardware, facilitating the release of a Sega Dreamcast port the following year. A high-definition remaster launched in 2012 for PlayStation 3 and Xbox 360 consoles, featuring music composed by Shinji Hosoe of Sweeprecord, arranged by Yousuke Yasui.
City Connection published the limited edition Black Box in Japan for Nintendo Switch and PlayStation 5 consoles,. Shipping is available through distributors CDJapan and Play-Asia, bundled with a fan booklet and the soundtrack album on compact disc. Under Defeat is available for Nintendo Switch, Xbox Series X|S, PS4 and PlayStation 5 consoles, along with Windows PC through Steam.
CDJapan - UNDER DEFEAT - Limited Edition Teikokugun Jikken Shotai Black Box (Nintendo Switch)
Playasia - UNDER DEFEAT: Limited Edition - PS5 / Nintendo Switch
本日はドリームキャスト『アンダーディフィート』が発売されて20周年です。おめでとうございます! pic.twitter.com/QErikWM5En
— ゲーム探偵団 (@game_tanteidan) March 23, 2026


