Herobrine is a character in a Minecraft mod who is said to be the brother of Notch, the creator of Minecraft. According to the document, Herobrine became jealous that Minecraft was Notch's idea, so he hacked into Notch's computer and added himself as a character in the game. He is depicted as having hacked into the game and having the same powers as Notch over the game world. The document provides some additional details about Herobrine's backstory and history of being banned from Minecraft servers.