I can remember what it was called, but played it on the amiga 1000, it was some ninja game, which was that violent really, but the ending scene you find the boss who is some guy in the suit and he crys "please dont kill me" and you end up killing him anyway... but the way he said the "please dont kill me" haunted me as a child so i use to turn the volume off for just that bit...being really young it was freaky..
Oh and this knight game which was fairly gruesome for its time... Moonstone: A Hard Days Knight, I use to play that heaps, was so much fun

always played it with my brother!! him being 10 years older than me would always win >.< but now I own him at all games, so i guess it is even
