I have been playing Last Chaos, one of Aeriagames' offerings, for about 3 months now. I am truly enjoying this game, and would encourage many to try. Its a MMORPG and its totally free! It's hard to find another company that is offering completely free games at the same quality!!! There is also an "Item Mall" where you can buy various items, but you dont have to, you can play Aeria games for years without spending a cent. There is sure potential for making the game better, but i think its a very good F2P game.
They have a wide variety of games and about 5 million registered users...