Borderlands 2 has shipped more than 8.5 million copies, making it the highest-selling game in 2K Games' history. The news came out of an Take-Two Interactive earnings call where it was also reconfirmed that new content for Borderlands 2 is still on the way.

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In its opening months, Borderlands 2 shipped 5 million copies , meaning that the extra 3.5 million copies were shipped over the course of more than a year.First released in fall 2012, Borderlands 2 is slated to come to Vita later this year courtesy of developer Iron Galaxy Studios. It will also be bundled with the Bethesda-published Dishonored on Xbox 360, PlayStation 3, and PC on February 11 in North America for $29.99 US.

Neal Ronaghan is a freelance writer who's biding his time until Borderlands 2 comes out on Vita. Follow him on Twitter if you want to know why.