Just showing off one of the 5 developer craft weapons. Here is #4 a explosive knife that kills any normal zombie in just a single hit. This one is gotten by finding the purple skull in the sewers and then dropping it off in an abandoned house.
Both areas are pretty close if you know the trick I have a full tutorial giving you the fastest and easiest path just check it out.
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The Developer's No. 4 Craft blueprint is obtained through placing the Purple Skull in its proper...