
Final Fantasy XI Online marks the franchise's debut into the MMORPG genre and serves as the eleventh entry in the main series. FFXI was the first cross-platform MMORPG globally, launching on Windows, PlayStation 2, Xbox 360, and Steam. Since its 2002 debut, it has become the most commercially successful game in the Final Fantasy lineup. Unlike traditional RPGs, FFXI features a shared world where players are not lone heroes. Instead, each player designs a unique character and journeys through the realm of Vana'diel alongside others, engaging in level progression, exploration, and a variety of missions and quests. Advancement in levels is achieved through cooperative play in a group known as a Party, where each member contributes their abilities to defeat enemies and earn Experience points. Combat unfolds in real-time, evolving the ATB system to a new dimension, a mechanic later echoed to some degree in Final Fantasy XII.
| PS2 | May 16, 2002 |
| PC | November 7, 2002 |
| X360 | April 18, 2006 |
