The PlayStation 4, as of December 31, 2018, has officially sold more than 91.6 million units globally. Announced by Sony Interactive Entertainment, the 2018 holiday season saw over 5.6 million PlayStation 4 units being sold, pushing the system to its new sales milestone.
Source: IGN.com: PlayStation 4 Sales Exceed 91.6 Million Units Worldwide

   
   
Tags: games   PlayStation