A Genesis version was developed and actually reviewed by GamePro (Nov. 1994, Rating: 2 out of 5), but it was never released.
In the Amiga/ST versions of the game there was one rather alarmingly poorly thought out gameplay change from the PC version - if your plane was damaged in combat, you could land and get it completely repaired, but you were not permitted to take on more ammunition!
To follow on from Kasey Chang's note about Red Baron, that was also the name of an early flight simulation which Bruce Stealy and Sid Meier played at an early computer games fair. They weren't impressed with it, and said they could write a better game in a week. It ultimately took 3 months, but the result was MicroProse's first ever game.
If you do really good in the game, one of the enemy aces may drop a note to challenge you to an aerial duel.
Sid Meier originally wanted to title this game "Red Baron", but later learned that Sierra/Dynamix already had the rights.
A second release of Knights of the Sky was made available that contained:
- General bug fixes
- Fix for fast 386's and 486's
- "Friendly" patrols
- Incremental damage from enemy fire
- Enhanced IBM sound driver
This update made the game much more enjoyable; sadly, not many customers knew about it.