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