ArenaNet

Guild Wars 2 is a massively multiplayer online role-playing game in development by ArenaNet. Set in the fantasy world of Tyria, the game follows the re-emergence of Destiny's Edge, a disbanded guild dedicated to fighting the Elder Dragons, a Lovecraftian species that has seized control of Tyria in the time since the original Guild Wars. The game takes place in a persistent world with a story that progresses in instanced environments.

Guild Wars is an online game with some resemblance to Roleplaying games. It's quite popular, no doubt due to having to pay no monthly fees. The game offers an MMO experience in the different town, where the "countryside" and missions are "instanced."