Hi! Anarchy Online ( also called AO ) is a science fiction massively multiplayer online role-playing game ( mmorpg ) released in 2001 by Funcom. It is set on the world of Rubi-Ka and its extra-dimensional double, the Shadowlands. It is one of the few popular multiplayer games that makes use of a science fiction setting as opposed to the more ordinary fantasy setting in multiplayer online games. As in many role-playing games, characters in Anarchy Online gain experience points, and therefore levels, through defeating enemies and completing missions or quests.