Here is the full list of all 13 Plaguepunk Justice achievements.
Finish the tutorial
Finish the game
Have two healers in the team
Have three healers in the team
Buy or sell something in the shop
Sell 10 bottles of useless serum
Use the painkiller for the first time
Use the bomb for the first time
Zombify three people
Guess any recipe
Discover the zombifying serum
Create a useless serum
Have 30 zombies in a level