swirling around the screen, which was inspired by a donburi bowl, while the slow speed of the helicopter was due to make the title akin to puzzle games and require a level of strategy. Yuge stated that cooperative gameplay was originally not developed but were requested in doing so after completing the single-player version due to simultaneous two-player titles being "a big trend" in overseas regions and being conscious of the American market, as the game had a realistic war setting. Around five members collaborated with the project on a six-month development period including Uemura and Yuge acting as programmers, as well as three designers. Artist Kōetsu Iwabuchi, who previously worked on Guardian, was responsible for the artwork. Despite being published by Taito, Uemura stated that the publisher allowed them to reveal the project was made by Toaplan. Uemura also claimed the project was influenced by Halley's Comet, as he wanted to portray the feeling of aiming and shooting. Release Twin Cobra was first released across arcades worldwide in October 1987 by Taito in Japan and Europe, as well as Romstar in North America. On 21 November 1988, an album containing music from the title and its predecessor was co-published exclusively in Japan by Scitron and Pony Canyon. Ports Twin Cobra was converted to multiple platforms by various third-party developers including the PC Engine (1989), Nintendo Entertainment System (1989), Sega Genesis (1991), X68000 (1993) and the FM Towns (1994). The PC Engine port, developed by A.I Company, was released exclusively in Japan by Taito. The NES port, developed by Micronics, was first released in Japan CBS/Sony and later in North America by Sammy. The Genesis port, developed by GRC, was first published in Japan by Treco, then in North America by Sega and later in Brazil by Tectoy. On 30 August 1996, Banpresto released a compilation for the PlayStation exclusively in Japan titled Toaplan Shooting Battle 1, which included both arcade versions of Twin Cobra and its prequel, an arranged soundtrack by Uemura and other additions. In November 2019, Twin Cobra was re-released for iOS and Android mobile devices only in Japan by MOBIRIX Corporation under the name Kyukyoku Tiger Classic. A port for Samsung Smart TV platform is also available through a Samsung TV's games panel. M2 ShotTriggers In April 2020, M2 announced a new version of Twin Cobra as part of their M2 ShotTriggers publishing label. It was