Dungeon Runners

Site: http://www.dungeonrunners.com/
Free-to-play

Dungeon Runners is a 3D fantasy MMORPG by NCsoft.
It is focused on solo playing, the game world is almost uniquely generated for every player, and the dungeons scale dynamically for parties. Players can gather in public meeting areas.
Gameplay
In Dungeon Runners players can explore dungeons(:D), battle ferocious monsters, discover artifacts, weapons and loot, take hundreds missions and quests.
Available classes are Fighter, Mage and Ranger.