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Seibu Kaihatsu Inc. was a Japanese manufacturer of arcade games. The company was founded in 1982 at Chiyoda-ku, Tokyo, Japan as Seibu Denshi Inc. (有限会社セイブ電子), but changed to its current name sometime in 1984. It is currently owned by Hitoshi Hamada.

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Dead Angle, also known as Lead Angle and Gang Hunter is a 1988 arcade game developed by Seibu Kaihatsu. It is the follow-up to the company's mobster-themed Empire City: 1931. In Dead Angle, players take control of the game's protagonist, who must rescue his girlfriend from a mob boss. A port of the game was released by Sega for its Master System.

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Dynamite Duke is a 1989 action arcade game developed by Seibu Kaihatsu. It was later ported to the Master System, Mega Drive/Genesis and X68000. Being a Cabal-based shooter, it can be considered a follow-up to Seibu's Empire City: 1931 and Dead Angle.

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Empire City: 1931 , also known as Street Fight, is a shooting gallery game that was originally released into arcades in 1986. The game has players taking on the mafia in 1931 New York City by gunning down mobsters one by one.

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Raiden is a series of arcade games by Seibu Kaihatsu initially available in arcades in Japan and later distributed to other countries by Fabtek and other arcade game manufacturers.

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Raiden is a 1990 vertically scrolling shooter arcade video game developed by Seibu Kaihatsu and published by Tecmo in Japan. The game's story takes place in the year 2090, when an alien species known as the Crystals invaded Earth. Players assume the roles of the Vanquish Crystal Defense pilot duo, taking control of two state of the art Fighting Thunders aircraft to defeat the Crystals and save the Earth.

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Raiden II is a 1993 vertical scrolling shooter arcade game that was developed by Seibu Kaihatsu. It was the second game in the Raiden series of vertical scrolling shooter arcade games that started with Raiden.

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The Raiden Project, originally released in Japan as simply Raiden Project (雷電プロジェクト) is a port of the arcade games Raiden and Raiden II to the PlayStation. It was released in North America as an original launch title on September 9, 1995, in Japan on January 27, 1995 and in Europe in November 1995. This was the only console release of Raiden II and unlike previous ports, these versions are based directly on the arcade originals. The Project version of the first Raiden is available as a download from the Japanese PlayStation Network store, which can be played on either a PlayStation 3 or a PlayStation Portable.

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Senkyu (戦球), known as Battle Balls in English, is an arcade puzzle game created by Seibu Kaihatsu and released in 1995. A version for the Sony PlayStation was later released in limited quantities for the Japanese market and is now extremely rare. A demo version of the game was also included in the PlayStation release of Raiden DX.

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Viper Phase 1 is a 1995 scrolling shooter arcade game by Seibu Kaihatsu. It is a spin-off in the Raiden series set in space.