What is the most popular online game

I personally think Runescape is the most popular game on the internet. It has millions of members logging in everyday and registiring online. Runescape is a worldwide game that is free. You can purchase membership. Membership has acess to different worlds, Equiped better wepeons and Armour. You also have the opportunity to build a house. Or you can just play for free. Were you can get different armour and wepeons. Talk to people all over the world and most importanly... HAVE FUN!!

the most popular kid online games are Club Penguin or Poptropica