Heroes and villains go together like peanut butter and jelly; without Ganondorf, there would never be a Hero of Time, and Link would spend his days living in Kokiri Forest. Without the Reapers, Mass Effect would’ve surely been a very tedious affair indeed. A good villain can turn a good story into a fantastic one, as exemplified by GLaDOS in Portal.
With that in mind, I ask you: who, or what, is your favourite villain in all of video gaming? Mine is that stupid Twitter imitation in