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