achievement help with boom headshot sniper one

[SecretLifeOfDimSim]

can't seem to figure out how to do this one, any help?

[ZidNt[V]irus]

Hi Crooked Minds, just get to any block until you get a sniper aim. You can get more crates by having combos and/or trapped. When you have the sniper aim, shoot any zombies outside of the big square (zombies). Keep restarting the block until you get the achievement. Good Luck !

[SecretLifeOfDimSim]

ooo i see thanks heaps