BioShock Infinite sells over 4million copies

BioShock Infinite has sold over 4million copies, according to Take-Two's latest financial results.

The critically acclaimed shooter launched in March and Take-Two CEO Strauss Zelnick believes that it'll become the biggest selling game in the franchise.

Elsewhere Borderlands 2, which was released September 2012, has sold over 7million copies.

It's expected to become the biggest selling game in publisher 2K's history.

Both games are supported by post-launch DLC, with new BioShock Infinite expansion packs announced yesterday and Borderlands 2 getting four campaign add-ons since release.