No missable achievements (plus 24 unknown)
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Successfully defeat the sky patrol.
Find the Sapphire Bracers in the big chest in Granminster Prison.
Find the Circuit Breaker in the big chest in the Coal Mines.
Find the Stylish Hat in the big chest in the Coal Mines.
Defeat the Lamia.
Defeat the Sand Dozer.
Unlocked the first class change.
Unlocked the second class change.
Defeat the Titan.
Complete the Experimental Potion for Atlas.
Return Laryn's wedding band.
Defeat Dhacian! Big surprise huh?
Find St. Theresa's Battle Armor in the big chest in the Celestial Nexus.
Complete the arena.
Unlock the final class change.
Collect all Spades cards, and clear the Venom Depths.
Defeat Dhacian on Hard difficulty.
Finish Alda's Trial of Arms in record time!
Defeat Qua'Lon on Hard difficulty.