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