Jaguar: I don't know yet, I haven't played enough games. Chequered Flag will be hard to beat, though -- it's just embarrassing.
I was going post this as the worst game on the system but went with the joke it has no bad games on it. I had this game and although it had a lot of great ideas the final play testing really let this game down. I really needed extra work. I was as good as Virtua Racing on the Sega saturn. Though as that game is terrible that is not saying much.