Here's a couple that nobody has mentioned (specifically, anyway), on, of all things, the C64. Now, I want to preface this by: These are still c64 games. If you didn't grow up with a C64 or similar computer, they're going to feel like complete shit. I get that. But
for the time and the hardware, these were pretty good games:
Samurai Warrior: The Battles of Usagi Yojimbo. Based on the famous comic. It was so close to almost being /amazing/, held back from it's true ambitions by hardware limitations. A better coder could probably have made it work, but even so, what we got was a reasonably ambitious adventure action game with some light roleplaying elements. Good music and graphics.