I remember when I got my Atari ST 520, to replace my Commodore 64 as my home computer (solely for games), the NES & Commodore where retired upon the arrival of the Atari & I instantly found myself addicted to one title, other genre's have been improved over the years but, the best beat em' up in history remains IK+

Anyway i've found a flash version of the game online (and am addicted again). Though it never seemed to be this tough before. I think the diffuculty has been bumped up (either that or im just a whole lot worse than I was 13 years ago.

IK++