Unlock the following concept art by performing the corresponding tasks:
CONCEPT ART - HOW TO UNLOCK Concept Art #1 - Get 100 shank kills. Concept Art #2 - Get 100 kills with the chains. Concept Art #3 - Get 100 kills with dual pistols. Concept Art #4 - Get 100 kills with the katana. Concept Art #5 - Get 100 kills with grenades. Concept Art #6 - Get 100 kills with the Uzi.