Roundabout

This Achievement is fairly self-explanatory, when the "Progress" reading on the main menu and pause screen reads 100% the Achievement unlocks. However, what is actually required for that isn't listed anywhere, so I'll list what I know is required here for clarity's sake.

For 100% you must:

- Complete all objectives on each ride. Fortunately, you don't have to do them all in one run, that would be quite impossible.

- Play and complete each Challenge in the city once. (I'm actually not totally positive this is required. If anyone can confirm I'd appreciate it)

- Find all collectables (Cash Stashes, Sick Jumps, Horns and Stars).

- Buy all limo paint jobs and hats.

- Unlock all other Achievements EXCEPT for "I've Covered Wars, You Know" and "Smoke & Mirrors". They don't count for whatever reason.

If you think you've done everything and are still missing some completion, the first thing you should do is go back through the map checking to make sure that you've 100% completed every mission. There's no tracker to make sure you've done them all so you have to check them manually, making it very easy to miss one. You should also double-check your collectable count on the pause screen, because some of the collectable Achievements seem to unlock slightly early sometimes, which could fool you into thinking you're done when you're not.

Good luck and good spinning! Let's go, Georgio!