Royal Blood has been through many ports, not the least of which being the major changes between it and its North American incarnation, Gemfire.  This is a listing of the systems it has been ported to, including box art where available.  Bear in mind that this may not be an entirely complete list, so if you track down a port that isn't mentioned here, please let me know so I can add it to the list.

Thanks goes out to D-BOY for making me aware of the Royal Blood ports, and tracking down scans of them on eBay.

Royal Blood	Gemfire
Famicom (1) Super Famicom (1, 2) Megadrive (1, 2) MSX (1) PC-98 (1, 2)	Nintendo Super Nintendo Genesis (1)