https://www.polygon.com/2018/6/14/17465488/the-last-of-us-sales-17-million-ps3-ps4

The Last of Us publisher Sony Interactive Entertainment has sold more than 17 million copies of the post-apocalyptic action game, developer Naughty Dog announced today.

A Sony representative told Polygon that the figure consists of units sold through to customers. Although the total represents sales as of April 2018, Naughty Dog posted the news on Twitter today, presumably because it’s the fifth anniversary of the game’s release. The Last of Us debuted June 14, 2013, on PlayStation 3, back when the PlayStation division was known as Sony Computer Entertainment. Within the game’s first 13 months on store shelves, Sony sold 7 million copies of it.