Knights of the Sky is a World War I combat flight simulator designed by Jeff Briggs and published by MicroProse in 1990 for MS-DOS. Ports to the Amiga and Atari ST followed in 1991. A MicroProse action-strategy game titled Knights of the Sky (actually a Sega Genesis port of 1992's The Ancient Art of War in the Skies) was also completed in 1994 but never released. Tommo purchased the rights to this game and digitally publishes it through its Retroism brand in 2015.