World of Warcraft is an MMORPG. Where thousands of players can play at once in a single world. Worlds are huge. You dont select a game or something you are instanlty put right into the game after u select your character. Its like Everquest but 1000000000000000x better and based on Warcraft. Its has a group of devleopers constantly developing the storyline as you and thousands of others play. Its really cool. Although there will be a monthly fee, due to the constant update on quests, weopons, etc. The fee is because programers like to get payed, and for server maintaince.