Here is the full list of all 20 Killer in the cabin achievements.
Complete 5 matches
Surviver a whole game session
Catch 50 fish
Wake up from sleeping
Perfect victory as survior
Win the game as killer
Eat meatstew
Eat 5 Fish soups
Eat 10 Fried fish
Eat 100 muffins
Eat 1000 cookies
Vote out killer
Collect 100 coins
Buy 10 hats
As killer, strangle sleeping player
As killer, kill with poision
Chop 10 logs
Start fire in the fireplace
Hit the dart board 5 times
Collect water 25 times