Cancelled Atari 7800 versionAtari had a 7800 port underway, outsourced to Imagitec Design, but abandoned it around 1992. You can read about it here.
DOS versionThe DOS port of Pit-Fighter inexplicably uses a sprite resizing algorithm that stretches only vertically, not horizontally. This results in very odd-looking "skinny" fighters onscreen (as well as almost everything else).
Information also contributed by Игги Друге