Here is the full list of all 14 BowmanVSZombies achievements.
Play your first game
Use 50 times a fire powerup
Use 100 times a fire powerup
Use 500 times a fire powerup
Use 50 times a health powerup
Use 100 times a health powerup
Use 500 times a health powerup
Kill a boss using your melee attack
Kill 10 boss using your melee attack
Kill 50 boss using your melee attack
Kill 5 enemies at the same time using your melee attack
Kill 10 enemies at the same time using your melee attack
Play one game during the Halloween Event
Play one game durint the Christmas Event