Here is the full list of all 34 Oceanhorn 2: Knights of the Lost Realm achievements.
Make your way to the Owru Sacred Grounds
Find the Owrus’ treasure
100% Pirta Region
Make your way to the White City
100% Sernoa Region
Power up your weapon or spell with a Power Shard
Sail for the first time
Defeat Galactoss
Find the Knight’s Shield
Collect your first bloodstone
Defeat the Mighty Bird of Pirta
Defeat the Mighty Turtle of Submeria
Defeat Mesmeroth
Defeat Oceanhorn
100% the Valley of the Warden Region
100% the White City Region
100% Submeria Region
100% Source Region
100% Outlands Region
Fly an airship for the first time
Make your way to Ootheca
Make your way to Source
Make your way to the top of Riskbourne Citadel
Witness the destruction of the White City
Find the Gillfolk’s treasure
Wield the Astroblade
Collect all Power Shards
Collect all Gear
Collect all bloodstones
Wield the Shield of Chronos V1.
Find all Mysterious Daggers.
Defeat all escaped prisoners.
Discover all overlooks.
100% all regions.