I just started playing Streets of Rage on the actual Master System. This game came out after the Genesis version but has tons of merit all of its own. I suppose it is the same as the Game Gear version but I like things on the big screen.

The Music is a blend of SoR 1 and 2 tunes remixed for the SMS.
The Sprites hardly flicker at all (eat your heart out Double Dragon).
All of the moves are there, I just need to figure out how to pull a special.

It's only got two enemies on screen at once, but proves SoR 1 could have been done on the SNES.