Bot

A bot is like an NPC in a multiplayer game, usually designed to behave like a human-controlled player.

It is usually made to do thing that are Monotonous such as "farming" and raising RPG levels, or something that is close to impossible to do. As a result, most RPG games have banned them from use because it is considered cheating. Many FPS games utilize them to provide computer opponents to players who would otherwise need to connect to an online server for multiplayer access.