Here is the full list of all 24 Skyborn achievements.
Successfully defeat the sky patrol.
Return Laryn's wedding band.
Find the Sapphire Bracers in the big chest in Granminster Prison.
Find the Stylish Hat in the big chest in the Coal Mines.
Unlocked the first class change.
Unlocked the second class change.
Unlock the final class change.
Find the Circuit Breaker in the big chest in the Coal Mines.
Defeat the Sand Dozer.
Defeat the Lamia.
Complete the Experimental Potion for Atlas.
Defeat Fafnir.
Finish Alda's Trial of Arms in record time!
Defeat the Titan.
Defeat Shynn.
Find St. Theresa's Battle Armor in the big chest in the Celestial Nexus.
Defeat Saehral.
Defeat Dhacian! Big surprise huh?
Defeat Dhacian on Hard difficulty.
Defeat Qua'Lon.
Defeat Qua'Lon on Hard difficulty.
Complete the arena.
Collect all Spades cards, and clear the Venom Depths.
Celebrate achievements being added to the game! Thanks for waiting!