My favs are Ecco that can be a bit frustrating sometimes but is fun overall, earthworm Jim a goofy side scroller, eternal champions and mortal Kombat for fighting games, NBA jam arcade baller, 90s nhl loop around the back of the net, mutant league football and hockey, streets of rage brawler with amazing soundtrack, and you already mentioned the sonics. Phantasy star 4 for an rpg maybe not the whole game I think it got pretty grindy but at least the first couple missions.