Best games were Dynamite Dux, Bug Bomber, Blues Brothers and Micro Machines. Dynamite Dux was a real blast, always punching each other silly
Crack Down also wasn't half bad when playing together. Other games... Supercars 2, Joe & Mac... Amiga ruled for multiplayer.
Edit: just had to add Brutal Sports Football. Amazingly good fun
Was Micro Machines 2 never released for the Amiga (not in HOL)? I remember playing that with four people crammed behind a single pc... Now THAT was pure, clean and healthy fun.