AdventureQuest Worlds - AdventureQuest Worlds (or AQWorlds) is an easy but very popular browser-based massively multi-player online Role-Playing game.
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.
Runescape - RuneScape is 3D Action-Adventure, Massively Multiplayer Online, Role-playing, Fantasy-based and browser-based video game developed and published by Jagex.
FlyFF - Flyff (Fly For Fun) is one of the greatest running fantasy based MMOs.
Dragomon Hunter - Dragomon Hunter is a traditional MMORPG mixes anime style graphics, MMO technicians and a focus on monster hunting into a single free to play experience.
Ragnarok Online - Ragnarok Online is a Fantasy-based and MMORPG video game developed and published by Gravity Co.