Here is the full list of all 32 BLACKTAIL achievements.
Complete the game
Defeat every fightable mushroom
Free all the rats
Find every Totem
Hear a great lot of bobok gossip
Learn all the skill recipes
Put all the Lost and Found on the shelf
See all the spider logs
Learn all the Gnowlledge
Find the Mushroom Sanctuary
Finish all the side quests
Trick the bees
Brew every skill of a single Hex type
Kiss all the toads and take them to the Yard
Befriend either Ant Queen or Mr. Larva
Open every Warden chest
Brew every Special Treat
Poison the hedgehog
Kick a shroomy back into its lair.
Earn the Queen title
Earn the Favorite title
Turn a blue Vodnik green
Squat many times
Hunt down a Golden Imp
Discover quite a few rose secrets
Earn either the Ornithologist or the Beekeeper title
Be either as good or as evil as possible
Collect 32 Teeth
Collect 20 Teeth
Accept Boruta's deal
Fish out a few fish
Smash many Root-infested vessels