FlyFF - Flyff (Fly For Fun) is one of the greatest running fantasy based MMOs.
Diablo - Diablo III is an action role-playing game that takes place throughout the dark fantasy world of...
LaTale - LaTale draws heavily from some other 2D side scrolling video games to provide a great fantasy MMORPG world.
Titan Quest - Titan Quest Anniversary Edition Titan Quest is back! Nordic Games (now: THQ Nordic) acquired Titan Quest in 2013 from THQ and started to work on bringing back the multiplayer and improving the game further.
NosTale - NosTale (The Tale of Nomads of Silver Spirit) is a totally free MMORPG that includes simple (but beautiful) graphics and also lots of class options.
Grim Dawn - Crate Entertainment is an independent development studio founded by former design and art leads of Iron Lore Entertainment.