1. Citra
2. I really don't know, but I would guess it doesn't.

3. I don't really understand this question.. Please explain better.
4. Maybe, but probably not. Each runner would have to wipe their game data after every attempt, and that process is very complicated.
5. Again, I doubt we will add it, but it will most likely be called All Achievements if we do.

Achievements carry over worlds, and probably nobody will want to reset their copy after every single attempt, so it’s just not going to be possible.