Luke Skywalker and Darth Vader are fighting it out (again), but this time it's an epic battle that takes place in Fallout 4, the excellent RPG that Bethesda unleashed on the world at the end of last year. This entirely mind-bending event is possible courtesy of modder Cosmic Contrarian, who is know web-wide for modding large battles in Fallout 4. You can check out the 20 minute clip over on YouTube.