The Witcher 3 sold 28 million copies, PC being the most followed by PS4, Xbox One and NSW

[Maddox]

Sales of #TheWitcher3 by hardware platform (units sold)

Pixel counting from this graph gives rough results per platform:

PC: ~12.4m
#PS4: ~10.8m
#XboxOne: ~4.3m
#NintendoSwitch: ~0.7m

Total: ~28.3m

Total of copies sold:

TW3 sales in units

2015: ~9.471.830
2016: ~4.190.140
2017: ~4.401.408
2018: ~3.591.549
2019: ~6.619.718

Total: ~28.274.645

https://www.cdprojekt.com/en/wp-content/uploads-en/2020/04/management-board-report-on-activities-of-cd-projekt-group-and-cd-projekt-s-a-in-2019.pdf