Warhammer Online (2004)
Warhammer Online lets players engage in battle in a persistent online world based on the popular Warhammer tabletop wargaming universe. This game was canceled and picked back up by Mythic.
Although the gameplay in Wizards is primarily of the real-time strategy variety, it does include puzzle and arcade-style action elements.
Mutable Realms is working on a fantasy online RPG that will support tens of thousands of players in a single game world.