15 Video Game Heroes Who Became Villains 

Kazuya – Tekken Series

While it might be a bit hard to call Kazuya a “hero” persay, at least in the context of current Tekken, it’s easy to forget that he was originally positioned as the hero of the original Tekken game, and in many ways one of many Ryu look alikes that all fighting games by law needed to have back then. The frail and timid boy was abused so terribly by his contemptible father Heihachi Mishima that the devil inside would consume him, and kick off what is probably the second most complicated and destructive family drama after the Skywalkers.