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