Since beyond living memory, great and fantastic beasts have roamed the world, and mankind has fought them; some for glory, some to protect others, but always the monsters have been there. But when legions of mysterious people appear, engulfed in strange blue light, bearing deep wounds of both mind and body, strange things begin to happen, and a darkness unlike any other awakens. 3U

Meteors, signals, apologies, and that tricky little thing called humanity- four years after the events of Portal II, Wheatley's been handed a second chance, but it's not going to be plain sailing…