The new game has exceeded expectations and build very impressively on the success of Arkham Asylum selling nearly 5 million copies world wide in its launch week.

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Batman: Arkham City launched on the and on October the 18th in the and October the 21st in the and and since then it has shipped 4.6 million units according to Interactive's latest figures.

Developer Rocksteady's Sefton Hill said: "The true test for any game is what the players think and we have been thrilled by their reaction to Batman: Arkham City. The team at put every ounce of effort into making the best Batman experience we possibly could, so we are overwhelmed by the incredible feedback from the community."

All this was achieved with the version still to be released. PC gamers will be able to explore Arkham City from November the 18th.

By Ewan Aiton