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