According to an interview on Industry Gamers, the franchise has netted a whopping 13 million sales to date.
Nathan Drake's first escapade appeared on PlayStation 3 back in 2007. Naughty Dog's developed two more entries in the series since, with the latest releasing last month on PS3.
A fourth Uncharted game is scheduled to release early next year on PlayStation Vita, with Sony's premium handheld developer, Bend, at the helm.
The series should easily surpass 15 million units within the next six months, ensuring there will be more Uncharted in the future.