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