Crazy Otto may refer to:
Fritz Schulz-Reichel (1912–1990), a German pianist known under the stage name Crazy Otto Crazy Otto (album), a 1955 album by Crazy Otto The Crazy Otto Medley, a ragtime medley originally by Crazy Otto, later recorded by Johnny Maddox Johnny Maddox (1927–2018), an American pop musician Crazy Otto, a Pac-Man ROM hack, subsequently developed into Ms. Pac-Man to avoid legal action