Keenan wrt crashes, have you tried a verification of the games files, as whilst i'm no developer, the last few lines of the output.log look as if various terrain types aren't loading, and that's just looking straight at the end of the log, not in depth. I had a very similar issue with my Nvidia 770 starting on one or two early access games, then on AAA titles. That unfortunately turned out to be a faulty card.
