For me... While I was blown away by Test Drive 1 & 2 on Amiga, these days I remember them more by what they did on Sega Megadrive/Genesis. They stuck two fingers up at Sega by means of not wanting to deal with them directly but instead started releasing their own games on their own cartridges, (Turrican being one of the early ones). And yeah they got hold of the Universal Soldier movie license and needed to do something with it hence why MD Turrican 2 which they were working on had a cheers easy Uni Sol make over. Bar the graphic changes, tweaks and 4 extra stages it's still Turrican 2 through and through regardless. I forget the term but Sega even changed it's cartridge id code so Turrican and maybe a few others would not run on a Model 2 Megadrive. Sega took Accolade to court over the use of it's id code.
And then out of the blue Sega bow down to their demands and the game GOD's not only get's a better port on MD than the Amiga but is fully licensed by Sega and shipped with new machines around the same time!
and who can forget the amazing Zero Tolerance. It was a very playable first person shooter that didn't require any fancy hardware and it came at a time when the only competition it had was Doom on Sega 32X and Atari Jaguar. Accolade had done something amazing for the time and thought impossible, they even added a machine link-up option if you bought and sent away for a special joystick cable. I've always highly respected this game as it gave hope to more Doom like games when there was none for 16bit machines, shame the Sega Saturn and Sony Playstation put a stop to that having been released in Japan that same year.