Here is the full list of all 57 Zombie Hunter achievements.
Use 10 radars.
Reach 50 kills with bow.
Use 10 hollow bullets.
Buy 10 different weapons.
Complete all the missions of region 5.
Kill all the super zombies.
Kill Maniatic
Kill DeathKiss.
Completa 25 perfect matchs.
Complete a perfect match.
Complete all the missions of region 4.
Unlocked region 5.
Reach 50 kills with pistol.
Kill Silent Freezer.
Kill Fat.
Unlocked region 4.
Complete all the missions of region 3.
Use 10 Spankys.
Kill LordNight
Kill Captain Trout.
Kill Sergeant Z.
Complete all the missions of region 2.
Kill Zrim Reaper.
Unlocked region 3.
Kill Zordor The Clown.
Kill 1000 Prickles.
Reach 500 headshots.
Kill Bubbles.
Reach 500 kills.
Kill Splithead.
Complete all the missions of region 1.
Unlocked region 2.
Kill Zelvis.
Buy your first weapon.
Reach 50 kills with automatic.
Kill Redspike.
Reach 100 headshots.
Reach 100 kills.
Kill 4 zombies on strike.
Kill Kyofu.
Reach 50 kills with sniper.
Reach 50 headshots.
Reach 50 kills.
Upgrade 15 time your weapons.
Kill Dr. Muscle.
Reach 25 headshots.
Reach 25 kills.
Kill a civilian "by error".
Lost a match.
Upgrade your weapon for the first time.
Open a mistery box.
Reach 50 kills with bazooka.
Use 10 dogs.
Kill 10 zombies on strike.
Complete all the missions.
Kill The Twins.
Kill Headless Walker.