Here is the full list of all 25 Arboria achievements.
Complete New Game++
Complete New Game+
Complete one level of Durnar without Healing Bongo in Inventory
Slay Jormund and fulfill your destiny
Reach Father Tree Level 10
Destroy Dummy
Slay all Bugz Queen Sisters
Unlock all the NPCs in the Village
Slay Gobbok
Reach Top 1 Rank on Graveyard with Yotun that has a Negative Trait
Fill your whole inventory with Veri
Slay Repta King
Die without collecting any Veri
During one run use at least 30 Usable Items (Traps, Grenedes etc.)
During one run equip 5 different Symbiont Archetypes
Complete 5 Symbiont Blueprints
Die for the tenth time
Defeat your first Mini-Boss
Find a legendary weapon
Defeat 100 enemies in a single run
Complete your first Blueprint
Complete 3 root events in a single run
Die for the first time
Purchase your first upgrade
Enchant or Craft any Equipment using Essence