EasyUO is a software project originally dedicated to automating the official Ultima Online game client, allowing users to write scripts that control all aspects of gameplay, from logging in to choreographing complex in-game interactions of characters and objects in a complex game environment. The goal of the developer is to provide software that is scalable to the maximum number of game clients supportable by users' computing platform and capable of controlling all existing in-game actions, whilst providing a sandbox-like environment for scripts such that they cannot negatively affect other running programs or the underlying operating system.