This seems to very much be a work in progress (despite the "released" status.)
The game refers to zones, but nowhere is it explained what those are, how they are connected and why it only takes a d6 to find out which ones become "unsafe".
The defend action is supposed to increase your DEF stat, but the blurb on combat mechanics doesn't include anything about this having any effect whatsoever.
Arena Hazards aren't explained at all. (presumably you roll SUR? but what is the DC?)
Scavenging is also poorly thought out (unless you roll SUR to get access to loot, and only then do you roll for loot, without bonus?)
Traits have no game-play value.
P.S. also, the PDF (like most of PFD23's pdfs) is named Untitled Document. This is, obvi, irrelevant to the game, but since it would have taken 5 seconds to fix, demonstrates the author's attitude.