Natural Selection 2 is really pushing that October release window it set up in September; it's now due out on October 31. The original Natural Selection mod came out on October 31, 2002, precisely 10 years prior to its sequel's launch date.
"As the old saying goes, 'you've bitten off more than you can chew,'" Unknown Worlds writes in its release date announcement. "To which we reply: 'swallow it whole.'" While we're not quite sure of the context for that one, it is understandably spooky.