The PlayStation 4 has now sold more than 18 million units worldwide, with sales of 18.25 million units. The milestone was achieved on the week ending December 20, 2014, where it sold 898,665 units. The PlayStation 4 for the week also sold nearly as much as the Xbox One and Wii U did combined. The PlayStation 4 was just 60,581 units away from outselling its rivals combined. The PlayStation 4 is currently 962,396 units away from equaling the combined sales of the Xbox One and Wii U.