You modern people with your fancy book learnin’s might be accustomed to having fighting games with multiple characters, but back in the day we just had the same character fight itself with a slightly different colour scheme and we were happy with it, by golly.
At any rate, Barbarian was a cracker of a game, especially when you pull off the move where you swung around and chopped the other bloke’s head off. Could it have been the first fatality in a fighter? Hmm. Gonna stare out the window for a few hours and think about that one.