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.
Die 50 times
Wear the Chef Hat
Change the DNA of enemies 100x
Save 100 civilians
Kill 50 Enemies with Sniper Rifle
Make 500x Combo
Kill 100 Enemies with Freeze Gun
Summon 77 Witches
Collect 100 Pumpkins
Collect 1000 Badges
Collect 100 Candies
Catch 69 Ghosts
Wear the King Crown
Wear the Sombrero
Wear the Pope Hat
Wear the Santa Hat
Wear the Viking Helmet
Eat 100 Donuts
Kill 100 civilians
Throw 100 grenades
Kill All the Bosses
Finish the game on the ThumbSucker difficulty
Earn Score Higher than 4000
Earn Score Higher than 5000
Kill 1.000 Enemies
Kill 100 Enemies with FlameThrower
Eat 100 Mushrooms
Gather 1.000 Dollars
Earn Score Higher than 1000
Earn Score Higher than 1500
Earn Score Higher than 2000
Earn Score Higher than 2500
Earn Score Higher than 3000
Earn Score Higher than 500
Kill Your First Enemy