You are looking for some adventures? There are lots of MMO games, you can play for free. Games like Maple Story, RuneScape are most popular free online games, but there are lots of others. I like very much RuneScape. This game maybe is very ugly when you see it for the first time, but after some time you can really fall in love in RuneScape. In this game you can do whatever you want, and its unique skill system and advancing process is very interesting. And it's free to play! In RuneScape is playing in one time from 100.000 to 200.000 players. Game was created by one guy, Harvard student who created it with his brother. Now they got few millions of $!

Maple Story is very light and colorful game created few years ago. It's in manga super deformed style, you know little heroes with funny big - heads (if someone know something about manga - he know exactly what I'm talking about). Nevertheless, not so long ago, Asians served us large dose of entertainment - invented MMORPG (stands for: Massively Multiplayer Online Role Playing Game) in 2D - Maple Story! Game is here really good and very simple; you must kill monsters to have experience points. There were some problems before with bots in game, but now producers won this round. You can talk with others, go into party and play with others - everything for you. My brother played some time in Maple Story, and said that game is ok but after World of Warcraft is weird to taking one step back to games like Maple Story. But it's only his opinion. I think it's really hard to tell, if someone like free games after pay-for-play mmo games it's ok. I read that free online games are the future of this genre - games you can play via your explorer.