18 Years Later, Why Are People Still Playing Ultima Online?

Why does Ultima Online still have players even after 18 years? - GIGAZINE

Welcome to Tarisland: Mystery of the Hollows, a Game Bringing Balance to the World of MMORPGs - IGN

Ultima Online - Alchetron, The Free Social Encyclopedia

Raph Koster Rock Paper Shotgun

Ultima Online - Wikipedia

RPG (Page 238) Rock Paper Shotgun

História dos Jogos Online: de MUD até Ultima Online, jogar online jogar online

The Daily Grind: What's the oldest MMORPG you still play?

Can You Really Be Addicted to Video Games? - The New York Times