Full list of all 53 Fell Seal: Arbiter's Mark achievements.
The base game contains 43 achievements, and there is 1 DLC pack containing 10 achievements.
Master all 19 base Monster Classes
Get the second ending
Get the first ending
Defeat at least 4 enemies with a single hit
Defeat Morgaine
Defeat an enemy with a Berserk, Charmed, or Mind-Controlled enemy
Complete the Ancient Path
Complete the Obelisk riddle
Open all treasure chests
Master all 6 special badge Classes
Win the second Tournament
Craft a final-tier weapon
Master all 20 base Human Classes
Visit the fifth Relic
Visit the fourth Relic
Recruit Kairu
Cleanse the Cursed Shield
Obtain all gadgets
Open 50% of treasure chests
Complete the Halloween encounter
Master all Human story character Classes
Win the first Tournament
Unlock all 20 base Human Classes
View all optional dialogue events
Recruit Katja
Save Somier a second time
Visit the third Relic
Use your first Class badge
Unlock the Spymaster Class
Defeat Lady Anquine
Recruit Bzaro
Visit the second Relic
Change Class at least once
Unlock the Demon Knight Class
Recruit Yates
Defeat an enemy with falling damage
Master any Class
Visit the first Relic
Drown an enemy
Craft your first item
Unlock the Marked Class
Defeat an enemy by using a Counter Ability or Thorns
Defeat a unit with its Elemental weakness
Master all 22 Monster Variants.
Complete all unique Hunts and large-scale battles.
Enlist each of the base 18 recruitable Monster types.
Complete all Missions.
Fully upgrade all 5 regions.
Complete an encounter deploying only Monsters.
Master the 3 new Human Classes.
Defeat an enemy with a Pet Effect.
Complete 100% of Missions in one region.
Build a Guild Upgrade.