Cabal online is a good free mmorog with a lot to offer.
In Cabal you have a few classes to pick from. A lot of the classes are melee combat classes, but a some use other weapons and powers. You are basically dropped into this world where you go around killing things and doing quests. This game has similar combat to Dungeon Runners and Metin 2, but there is something different. You have to click a button on the screen to attack instead of just clicking on the enemy. This is how you do special attacks, and your normal attacks.
The graphics in this game are good. Though there are better looking free mmorpg's out there.
The sound is good, but the music is really good. The music has a nice beat to it, and it is good to listen to when you are slicing up monsters.
Over all Cabal is a good mmo that you should give a try, if oyu are in to mmo's. But even if you are not, you still might want to give this game a try, because, it is completely free.