Could we list here the easter we found, or do you prefer a post per easter egg?
spoiler
I just heard “Doc” Manning saying “please state the nature of your medical emergency”, which is a phrase used by the holodoc in Star Trek Voyager (and others).
I also found a “earbug” in Pilgrim’s Rest, which in my mind, is a reference to Star Trek 2.
The mission “Entangled” is basically a truncated version of the plot from Half Life. I won’t go into too many details but the artifact you retrieve is the Lambda artifact (the Half Life logo is the Greek letter lambda) The suit you get as a reward even has orange highlights that are mildly reminiscent of the HEV suit.