Here is the full list of all 35 Donuts'n'Justice achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Collect 100 Pumpkins
Summon 77 Witches
Finish the game on the ThumbSucker difficulty
Collect 100 Candies
Kill 100 civilians
Earn Score Higher than 2000
Earn Score Higher than 2500
Earn Score Higher than 3000
Earn Score Higher than 4000
Earn Score Higher than 5000
Wear the Chef Hat
Catch 69 Ghosts
Wear the Viking Helmet
Wear the Santa Hat
Wear the Pope Hat
Wear the Sombrero
Earn Score Higher than 500
Earn Score Higher than 1000
Earn Score Higher than 1500
Change the DNA of enemies 100x
Wear the King Crown
Kill All the Bosses
Make 500x Combo
Kill 50 Enemies with Sniper Rifle
Kill 100 Enemies with Freeze Gun
Eat 100 Donuts
Collect 1000 Badges
Die 50 times
Kill 1.000 Enemies
Kill 100 Enemies with FlameThrower
Save 100 civilians
Eat 100 Mushrooms
Gather 1.000 Dollars
Throw 100 grenades
Kill Your First Enemy