Here is the full list of all 30 The Warhorn achievements.
Take your clothes back from quartermaster Adam.
Create your village by placing a totem.
Find and read all the weirds notes that are in the game.
Kill your first night hunter.
Finish the game by finding the warhorn.
Find black metal that will enable you to craft black knight armor.
Find the map of all puzzles and dungeons.
Become one of the wizards in the magic castle.
Craft your first tool in the game.
Use the gravity necklace.
Learn how to use magic runes.
Create your first sword in your village.
Finish all the quests for the Flower King.
Visit the snowy island.
Visit the desert part of the map.
Visit the jungle island.
Kill the spider in the mine cave.
Find the skull staff.
Find a way to open the entrance to the jungle pyramide.
Get a map of the main island
Learn how to use a bow.
Learn how to use lockpicks.
Buy a pig and whistle to make it come to you.
Kill other player.
Charge an empty rune.
Use a boat for a fast travel.
Reach the first level in the game.
Build a campfire.
Drink a night vision potion.
Use a carriage for a fast travel.