My cousin had a Genesis and its MK port, so that's the one I remember best. I do remember the "ABACABB" cheat to enable blood and Fatalities on it (and the "DULLARD" cheat to get the cheats menu!). The Amiga port looks a bit like the Genesis port with a wee bit less color.
I never played the SNES port, but I do remember all the talks about its censorship issues! And that also taught Nintendo a harsh lesson, because Mortal Kombat II was fully uncensored on the SNES after that!