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