Yet another instance of it being done:
http://www.kinematic.org/911.htmlIt was an Unreal Engine mod that earned quite a bit of ire from people, and is now presumably defunct.
This is not the first instance I've seen of a commercially developed game appearing to copy a mod that preceded it, but maybe mod communities and commercial developers alike are subject to Zeitgeists?
This message was edited for typos at Oct 5, 15:13.This comment was edited on Oct 5, 15:14.