[/spoiler] What I know (or think I know): an alien virus (Tuurngait) arrived in Earth many centuries ago, it remained hidden until it was freed some time later, a secret group was studying the virus and built a shelter for this purpose in Greenland.
What I don't know: How it exactly ends, who or what survives after the last scene. I read that "the game ends in a definitive and satisfying conclusion". I obviously missed some part. Can somebody explain it to me?[spoiler]