It’s not really luck, you just have to figure out what fulfills each achievement through trial and error. For puzzle achievements, they give you the name of the achievements as a hint, and you have to figure out how to complete them. For the mystery achievements, you get nothing, so those are a bit more luck based, but they still happen for specific reasons. I’d kind of like to know how to get them though. It seems like the mystery achieved are all “map” type achievements, so you’ll probably get them automatically just by darting dinos and spinning stops.