In this part of the Metro: Last Light survival guide 4A Games show the improvements they have made to gas masks and gun customisation. Instead of spending hard earned bullets to buy the same gun but with a scope, this time the same gun can be changed to suit your needs. This won't stop the metro being a cruel mistress though, but every little helps.
Metro: Last Light on PC, PS3 and Xbox 360 May 14th in NA and 17th for the EU.
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