Here is the full list of all 26 Thea 2: The Shattering achievements.
Win a challenge that autoresolve deemed to be unbeatable.
Recruit Captain Bear.
Have Goblin Wine as food during one night (9 consecutive night turns).
Visit another biome.
Retreat from a difficulty 1 challenge.
Complete all Theopedia terrain entries.
Complete Resources research tree.
Complete Items research tree.
Unlock all gods.
Reach lvl 20 on a character.
Finish the main quest playing on hard difficulty.
Start with two human children only and survive 100 turns.
Craft The Other Ring using only Tier 5 materials.
Finish the main quest and become allied with the Light.
Have a character die in a group without food.
Finish the Divine Path quest with a chosen who started as a rat.
Win without founding a village.
Destroy 5 settlements.
Do not let your people consume meat or meat-containing meals for 50 turns.
Have 20 different food types in a group's inventory.
Travel 1000 tiles on sea.
Eliminate all opponents before the Fight Phase begins.
Win a difficulty 5+ challenge without sustaining any damage.
Craft 50 equipment items.
Trade for 3000 worth of items using only food.
Play for 500 turns.