Proteus, the mythical sea god who could alter his appearance at will, embodies one of the promises of online games: the ability to reinvent oneself. Yet inhabitants of virtual worlds rarely achieve this liberty, game researcher Nick Yee contends. Though online games evoke freedom and escapism, Yee shows that virtual spaces perpetuate social norms and stereotypes from the offline world, transform play into labor, and inspire racial scapegoating and superstitious thinking. And the change that does occur is often out of our control and effected by unparalleled—but rarely recognized—tools for controlling what players think and how they behave.