Looking at my notes, maybe these could also be included:
- Böbl (NES homebrew): little in terms of optionals, the only that I remember being collectible rubber ducks, which appear if you collected them at the end screen.
- Dissidia 012 and FFVII Crisis Core (PSP): iirc both have but checking next.
- Nicktoons: Battle for Volcano Island (PS2): has badges in a more common achievements sense.
- The Simpsons Game (PS2, PSP, Wii):
iirc it had achievements but also checking next.Main Menu > Extras > Clichés; I'd count since some can be rather challenging to unlock, and they're just a list proving you did their conditions.