DJ Hero is a 2009 rhythm game developed by FreeStyleGames and published by Activision. It is the first spin-off of the Guitar Hero series. It was released on October 27, 2009, in North America and on October 29, 2009, in Europe. The game is based on turntablism, the act of creating a new musical work from one or more previously recorded songs using record players and sound effect generators, and features 94 remixes of two different songs across numerous genres.

Rhythm game or rhythm action is a genre of music-themed action video game that challenges a player's sense of rhythm. Games in the genre typically focus on dance or the simulated performance of musical instruments, and require players to press buttons in a sequence dictated on the screen. Many rhythm games include multiplayer modes in which players compete for the highest score or cooperate as a simulated musical ensemble. Rhythm games often feature novel game controllers shaped like musical instruments such as guitars and drums to match notes while playing songs. Certain dance-based games require the player to physically dance on a mat, with pressure-sensitive pads acting as the input device.