Detention (Chinese: 返校; lit. 'Returning to School') is a horror adventure video game created and developed by Taiwanese game developer Red Candle Games for Steam. It is a 2D atmospheric horror side-scroller set in the 1960s Taiwan under martial law. The game also incorporates religious elements based on Taiwanese culture and mythology. The game was released on 13 January 2017. A demo version was released on Steam Greenlight on 13 June 2016.
The game's concept originates with the Red Candle Games co-founder Shun-ting "Coffee" Yao. In February 2017, a novel based on the game was published by novelist Ling Jing. A live action film adaptation distributed by Warner Bros. Taiwan was released on 20 September 2019.