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