Talk:Maxwell (NPC)/@comment-10163209-20130612033128/@comment-8812489-20130612194831

http://en.wikipedia.org/wiki/Fourth_wall

Or, in other words, the fourth wall is broken when the characters act as if they knew they're fictional and that there's an audience watching them. (in this case Maxwell was aware of the makers of the game and the fact that his world is in a game).