The simple nature of the graphics seemed to make our Wii something we pull out at parties to interact with each other rather than sequester ourselves in some kind of first-person roll-playing game in an elaborate digital world.

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It's a finale that has been compared to "Apple dissolving Microsoft", and led to some players calling for the game's developer, CCP, to "roll-back" the game to the previous day and cancel the change.

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Earlier, in October, Zynga cut full-year earnings estimates on weak game performance and delays in roll-outs of new games.

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