Here is the full list of all 50 Arcana Heart 3 achievements worth 1,000 gamerscore.
Finish Story Mode.
Finish Story Mode on the most difficult setting.
Watch all of the endings in Story Mode.
Watch the bad ending in Story Mode.
Defeat Parace L'Sia in Score Attack Mode.
Train for 15 minutes straight.
Fight against all characters in Network Mode.
Fight against all Arcana in Network Mode.
Play in a Player Match.
Play in a Ranked Match.
Unlock all of the illustrations in Gallery Mode.
Unlock all the link animations in Gallery Mode.
Use all characters.
Use all Arcana.
Win with a Critical Heart.
Win with an Extended Critical Heart.
Win with an Arcana Blaze.
Win while the Extend Force is unusable.
Raise one character's RP Level to 10.
Raise all characters' RP Level to 3.
Heart - Tear down all that stands in your way with the power of love!
Saki - Decommission your opponents with skill and precision.
Kamui - Unleash the power of the Spiritual Sword to take down your opponents.
Konoha - Switch places with a bunch of stuffed...yous!
Maori - Complete a combo with the aid of all your sisters.
Mei-Fang - Finish your fight in mint condition.
Lilica - Never give up. Never surrender!
Lieselotte - You can rebuild her... You have the technology!
Yoriko - Master the follow-up.
Kira - You spin me right round, baby, right round...
(Secret)
Fiona - Dish out as much damage as you can with a single attack.
Petra - Life is cheap, and so are bullets.
Zenia - Timing is of the essence.
Elsa - Master a variety of weapons.
Clarice - Steal life from your opponent.
Catherine - Experimental weapons!
Dorothy - Master the deck of cards.
Angelia - Almost there...
Akane - Show them your ultimate burning passion!
Nazuna - Master the follow-up.
Weiss - Execute a combo of 100+ hits, without assistance.
Eko - Just keep drawing.
Eko - Launch some REAL fireworks.
Scharlachrot - Trap your opponent.
Combo like the Devil!