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