Here is the full list of all 46 12 is Better Than 6 achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
To get all hats
Pass the game
Blow up 100 enemies with dynamite
Get all perks
Pass the third act
Kill 100 enemies with a bow
Skip 40 dialogs
Pass the second act
Kill 40 enemies with a bow
Kill 15 enemies with a bow
Kill 10 enemies with a bow
Kill 100 animals
Complete 10 repetitive tasks
Break 100 bottles
Earn $100
Blow up 40 enemies with dynamite
Kill 100 enemies with a rifle
Earn $50
Kill 100 enemies with a gun
Kill 40 animals
Pass the first act
Earn $30
Break 70 bottles
Kill 100 enemies with a revolver
Break 30 bottles
Kill 40 enemies with a gun
Kill 100 enemies with a knife
Kill 40 enemies with a rifle
Skip 15 dialogs
Kill 15 enemies with a gun
Kill 5 enemies with a gun
Kill 10 animals
Kill 40 enemies with a revolver
Earn $10
Break 10 bottles
Kill 15 enemies with a revolver
Kill 15 enemies with a rifle
Kill 5 enemies with a rifle
Blow up 15 enemies with dynamite
Blow up 5 enemies with dynamite
Kill 10 enemies with a revolver
Kill 40 enemies with a knife
Skip 5 dialogs
Kill 15 enemies with a knife
Kill 10 enemies with a knife
Pass the tutorial