Everyday millions of people log onto a simple game called Ragnarok Online. This game looks like an adults version of a kids game. It has an overlay of 3D with all the characters made 2D. I am going to give you three reasons to play.
Variety
This game has some of the most variety game wise and player wise. There are many classes, each upgradable and after you reach level 99 you can transcend unto an even greater class. There are hundreds upon hundreds of items you can have to customize your character and become the ultimate warrior, thief, mage, ect. The player base is also huge as well. There are people from every end of the world
Quests
If the hack and slash games are getting old for you, then this is the game. Upon the character creation and items there are hundreds of quest useful for gaining experience points and items. The good thing is, these quests can be completed with or without help from friends.
Cost
Most online games cost up to 30 dollars a month. This game, if you are playing legal, costs 10 dollars a month but the greatest thing is you don't even have to pay. The normal servers are made so it takes a while to get to the max level, on private servers it takes a much shorter time and they usually have a higher cap on their max levels.
All in all, this is a pretty good game if you are just beginning to play online games or have for a while. I recommend Revillusion located right here.