User blog comment:Master Sima Yi/Assassinews 31-03-'15 — Assassin's Creed Chronicles announcement trailer/@comment-213.205.252.61-20150512120810/@comment-13471981-20150512150944

Welp, evidently I have to read up on my lore. Though the Ancient Aliens bit is more of a trope than an actual way of referring to the First Civ. And I presume they just naturally evolved to that advanced state - or they came from somewhere else. I doubt the First Civ were 'created' by someone and I doubt that if they were, the series would ever answer that question.