Knights of the Sky is a World War I combat flight simulator designed by Jeff Briggs and published by MicroProse in 1990 for DOS and in 1991 for the Amiga and Atari ST. A MicroProse action-strategy game titled Knights of the Sky (actually a Mega Drive port of 1992's The Ancient Art of War in the Skies) was also completed in 1994 but never released. In 2007, it was also a working title for the never-finished World War I flight simulator that was supposed to be a debut title by the now-closed developer Gennadich Team.