AdventureQuest Worlds - AdventureQuest Worlds (or AQWorlds) is an easy but very popular browser-based massively multi-player online Role-Playing game.
Wartune - Wartune is an Action-Adventure, Strategy, Massively Multiplayer Online, Role-playing, Fantasy-based and Browser-based video game.
Eden Eternal - Eden Eternal is a Fantastic Browser-based, Action-Adventure, RPG and MMO video game developed by X-Legend and published by Aeria Games.
FlyFF - Flyff (Fly For Fun) is one of the greatest running fantasy based MMOs.
Adventure Quest - Adventure Quest is an Action-Adventure, Free-to-play (One Time Membership Fee) Single-player MMORPG, Browser-based and Fantasy-based video game developed and published by Artix Entertainment.
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.