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