The top 10 MMOs is quite the diverse bunch of popular Massive Multiplayer Online Games. Take a look at the list:
1. World of Warcraft, released 2004 – 8.5 million subscribers.
2. Habbo Hotel, released 2000 – 7.5 million active users.
3. RuneScape, released 2001 – 5 million active users.
4. Club Penguin, released 2006 – 4 million active users.
5. Webkinz, released 2005 – 3.8 million active users.
6. Gaia Online, released 2003 – 2 million active users.
7. Guild Wars, released 2005 – 2 million active users.
8. Puzzle Pirates, released 2003 – 1.5 million active users.
9. Lineage I/II, released 1998 – 1 million subscribers.
10. Second Life, released 2003 – 500,000 active users.