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