BioShock franchise has sold 7 million units

Sequel has shipped over 3 million worldwide.

Take-Two has revealed that BioShock 2, released on February 9, 2010 for PC, Xbox 360 and PS3, has shipped over three million units to date.

The publisher also noted that lifetime sales of the BioShock franchise stand at seven million units.

Find out what we thought of BioShock 2 by heading over to our review.