In the gaming world there are super computer-nerds who create what are called "mods". I mean PC-Nerd in a good way :) Anyway, they create what is called a "MOD" & basically it's some code that changes the look of a character in a PC video game. In this video it shows GRAND THEFT AUTO - VICE CITY where they have replaced some characters with Batman & Joker. They even made a mod for one of the cars that is the Batmobile. Now this GTA video is just an example. Please don't e-mail me wanting to know where these mods are because I don't know.