Bayonetta (ベヨネッタ, Beyonetta) is a third-person action game for the PlayStation 3 and Xbox 360, developed by Platinum Games in cooperation with publisher Sega. The game was released in Japan in October 2009, and in North America and Europe in January 2010. Bayonetta centers on its title character, the witch Bayonetta, who uses firearms and magical attacks to fight against angelic enemies. The game's developers designed its characters with modern style and fashion in mind, and is composed with a largely upbeat soundtrack.

Reviews praised Bayonetta for its easily-learned yet deep combat, fast pace, boss battles, time slowdown or "Witch Time" mechanic, and character and stage designs. The game has sold 1.35 million units worldwide by March 31, 2010. A sequel, Bayonetta 2, was announced exclusively for the Wii U, to be published by Nintendo. An anime film adaptation of the game by Gonzo, Bayonetta: Bloody Fate, was released in Japan in November 2013.