BioShock 2 has shipped 3 million units since it was released on February 9. That’s according to Take-Two sales figures released today for Q1 of fiscal 2010. The first entry in the BioShock series (originally released August 2007) has shipped 4 million units, bringing the franchise total to 7 million units shipped.
The report also stated that Grand Theft Auto IV (released April 2008) has sold 15 million units worldwide.
It seems likely we’ll hear about sequels from both franchises.