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