Overview
Some of those achievements are hidden because the developers have not added some weapons in the game yet.
17 hidden achievements
1 shot, 1 kill – Get 650 kills with the .50cal
Dangerous Eagle – Get 200 kills with the Desert Eagle
Demon Hunter – Get 666 kills with the Crossbow
Give me everything – and you get nothing instead…
Helmut did a good job – Get 200 kills with the USP
Hip Firing – Get 300 kills with the HK SMGII
It’s very Sauer – Get 200 kills with the P225
John’s Favorite Little Classic – Get 200 kills with the 1911
Look what you did to him! – NO DESCRIPTION
Machinepistole – Get 300 kills with the HK MP510
Schienzel – At least he ain’t a zombie
Sheriff’s right Hand – Get 430 kills with the .357
Standard Issue – Get 300 kills with the M4
Time to get stoned – Get 200 kills with the SR-25
Tiny but deadly – Get 300 kills with the HK 45
Turtle Lover – You can’t stop this hum train
Uzi the man? Get 300 kills with the Uzi