Here is the full list of all 42 Guns n Zombies achievements.
kill 15 enemies in 1 seconds with any gun.
Fully upgrade any turret.
Complete the game.
Complete game in cooperative mode.
Complete the game as Medic.
Kill 4000 enemies with auto rifles.
Buy any 3rd level tower during battle.
Kill 900 enemies with another enemy attack.
Сure once.
Use any special ability 100 times.
Kill 5000 enemies.
Kill 2000 enemies with auto rifles.
Buy any special ability in the store.
Kill 400 enemies with another enemy attack.
Don't use med kits 15 battles in sequence.
Don't use turrets while 10 battles.
Buy 5 weapons in store.
Play 15 minutes in cooperative mode.
Play 30 minutes in battles.
Fully upgrade any weapon.
Buy any Electric rifle.
Complete 8 battles on HELL difficulty.
Complete 8 battles on 3 stars
Destroy 1200 Crystal Walls.
Every battle scene has a materia. Find them all!
Complete all levels on 3 stars.
Complete all levels on HELL difficulty.
Complete all levels on HARD difficulty.
Complete game with Mechanic.
Complete game with Warrior.
Kill 10000 enemies.
Kill 20000 enemies.
Kill 2000 enemies with grenade launchers.
Kill 4000 enemies with grenade launchers.
Kill 2000 enemies with shotguns.
Kill 4000 enemies with shotguns.
Kill 2000 enemies with sniper guns.
Kill 4000 enemies with sniper guns.
Kill 4000 enemies with turrets.
Kill 2000 enemies with Electric rifles.
Kill 4000 enemies with Electric rifles.
Complete the N'Aliens campaign.