#4 World of Darkness Online
CCP has plenty to be proud of. The developer created one of the most original MMORPGs to date—EVE Online. The game not only showed the industry that an MMO doesn't need to have swords and elves to be successful, but that it can also be set in space, and almost entirely player-run.
Rather than creating preset content and quests for players to accomplish, CCP designed a setting as large as the real galaxy (with the added convenience of FTL travel) and allowed players to focus on what really matters in an online game: the community.
The studio has since announced a collaboration with RPG developer White Wolf to adapt the World of Darkness setting into an MMORPG. Tentatively titled "World of Darkness Online," the game promises to provide a strong focus on player politics and social interaction. Little else is known of the game at the present, but its developers have scheduled a launch window for this year.