Multiplayer 3d Online Adventure Games

What’s the best online multiplayer game?!?

I would like a game that doesn’t have to be downloaded and NO 3D please !!! It has to be free too. Something like dragonfable or mech quest. NO GAMES LIKE ADVENTUREQUEST!!!!!!!!! ACTION AND ADVENTURE and if possible medievil(with swords, capes….etc).

there is runescape but i used to play that game when i was in like second grade and it is for little fags

PS3 Home 3D world.