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