With all the Chaos Emeralds, of course. Only lost a couple of lives (Scrap Brain Zone 2 *shakes fist*) but somehow didn’t collect many along the way. I suppose it’s just because I didn’t bother trying for them, and after getting the Chaos Emeralds, didn’t bother with collecting many rings either.
The end of game boss is laughably easy these days. I remember him being nails back in the day, but Sonic 2 and Sonic 3 both have much harder final bosses so I suppose it’s all relative.
For a change, I’ll do Sonic 2 next, but as Knuckles.