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