Ultima Online (UO) is a graphical massively multiplayer online role-playing game (MMORPG), released on 24 September 1997 by Origin Systems. It was instrumental to the development of the genre, and is still running today. The game is played online, in a fantasy setting similar to that of the other Ultima games that preceded it.
The success of Ultima Online opened the door for the creation of many new massively multiplayer games. Ultima Online is a fantasy role-playing game set in the Ultima universe. It is online-only and played by thousands of simultaneous users (who pay a monthly fee) on various game servers, also known as shards. It is known for its extensive player versus player combat system. To maintain order in the online community, there are Game Masters who resolve player disputes, police the shard for terms of service violations, and correct glitches in the game.
Ultima Online was "The first MMORPG to reach the 100,000 subscriber base, far exceeding any game before it"