Here is the full list of all 18 FRACT OSC achievements.
Fly through the wreckage
A high mountain vault
Remember my song
Commited to a wave
A potent kit indeed
Power User
More choices ahead
A brave basin drop
A telling dead end
A forgotten dig site
Modulation memory
A crystal den
A vital dam plunge
Fly behind the mountain
A crystal crevasse
All the choir is here
Fly over the dig
A dome from the past