Talk:Stalker/@comment-26959384-20161228062221

SPOILERS

I used to believe that the Stalkers evolved to survive using metal that comes from crashed ships, as ships might crash frequently enough to supply them. I have, however, changes the theory, as it's clear that the Degasi is one of the first ships to crash on the planet.

Instead, I believe Stalkers evolved to collect precursor metals for enamal. The current titanium increase resulting from crashed ships is simply a temporary boost. We do see that the Stalkers go all the way to the crash zone to collect metal, so it's extremely likely that they also can locate sources of precursor metals, either at stashes, gates, facilities, or the G.U.N.