Historical time-line of Massively Multiplayer Online Games. With rare exceptions, a game must be a persistent multiplayer game to qualify. Titles are entered by their initial release date and, where possible, the end-date is included. Note that details currently simply link to the Wikipedia article for that title, but at a later point additional details may be included directly in the time-line. At this point, the focus on simply getting the titles into the timeline with a simple link to more details. Feel free to contribute records as appropriate.