Herzog Zwei, Dune 2 and General Chaos. Those three were probably my most played Megadrive games when I was a kid. SNES couldn`t really offer anything comparable in terms of real-time strategies(but it did have the best turn-based wargame of all time - P.T.O. II). Not sure if I`d enjoy Herzog Zwei if I played it now. The gameplay is too simplistic by modern standards. I`ll keep an eye on AirMech though.