Total BIscuit once did a video where he said the earliest source he could find for the definition of AAA was "
a AAA game is a game that scores "A" in the areas of "critical success, financial success, and innovation," but according him even that defintion wasn't entirely accurate. By that defintion, the only AAA game to come out so far this year would be The Witcher 3
Like Gilrond said, I usually mean AAA to mean big production games coming from large publishers. Namely EA, Activision, and Ubisoft, who are otherwise known as the "Unholy Trinity of Publishers: the Right Hand of the Devil, the Son of the Devil, and the Devil's Feces" (the Devil's Feces is Ubisoft, just in case you were wondering.) But in the case of medium sized, indie games (Age of Wonders 3, Pillars of Eternity, etc.) I might also call them AAA because I have no other way of distinguising them from teeny, tiny indie games. What're we supposed to call them.... BBB? I consder some of these games much better than titles from AAA publishers.