FlyFF - Flyff (Fly For Fun) is one of the greatest running fantasy based MMOs.
Maplestory - MapleStory is among the most popular of MMO in the 2D area scrolling style offering a user count will into the lot of players.
Flyff Gold - Flyff Gold is a 2D Fantasy-based, MMORPG and Brower-based video game.
Path of Exile - Path of Exile is a free to play online action roleplaying game that draws clear inspiration from Diablo but charts a path all its own.
AFK Arena - AFK Arena is an Adventure-based, Role-playing and Online Multiplayer video game developed and published by Lilith Games.
LaTale - LaTale draws heavily from some other 2D side scrolling video games to provide a great fantasy MMORPG world.