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