It's fairly safe to say that Square Enix is responsible for some of the most famous and popular villains in the entire industry. From Sephiroth to Xehanort, all the way to Mordegon and Lavos, Square Enix has created some truly memorable enemies for players to battle with over the years. But as Square Enix is a huge company that has developed and published an extraordinary number of games, there's no doubt a few villains that are going to get lost in the shuffle.