Complete the indicated task to unlock the achievement.

Achievement	How to unlock.
Amateur	Reach 10 level.
Cheater	Kill zombie by wall.
Expert	Reach 20 level.
Fanatic	Reach 45 level.
Immortal	Reach 75 level.
Impressive	Kill 100 zombies.
Mad Killer	Kill 1000 zombies.
Newbie	Reach 5 level.
Sniper	Kill more than 2 enemies at a time.
That's all you can?	Kill 10 zombies.
Zombies anihilator	Kill 500 zombies!