NCSoft

Aion is a visually stunning massively multiplayer online roleplaying game (MMORPG) where your character wields devastating powers and sweeping wings to explore a celestial world of breath-taking beauty and epic adventure. It features cutting-edge imagery, gorgeous environments, and a unique fantasy world. Your character plays a pivotal role in the fate of Atreia, where the enemy is not only the other player faction but a deadly ancient evil as well.
In February 2012 Aion became Free to Play!

Tabula Rasa is a sci-fi MMO that went online in October 2007. The official servers closed on Feb 28, 2009.

City of Heroes and City of Villains is a comic book themed MMO from Cryptic Studios and NC Soft. Heroes and Villains allows the player to play opposite sides of the conflict inside the setting of Liberty City.

City of Heroes and City of Villains is a comic book themed MMO from Cryptic Studios and NC Soft. Heroes and Villains allows the player to play opposite sides of the conflict inside the setting of Liberty City.

AutoAssault is a post-apocalyptic mmorpg where you drive in cars with weapons mounted everywhere and fight NPCs and opposing factions. There are 3 factions in all, humans, bio-meks and mutant, each has its own terratory and all can travel to the arena where PvP is possible