As part of their fiscal year 2018 Financial Results Report released earlier today, Square Enix has announced that NieR: Automata has surpassed 4 million total sales. This includes the original 2017 release and digital downloads alongside last year's Game of the YoRHa Edition.
It was just about 11 months ago when our 2017 RPG of the Year surpassed the 3 million sales threshold. NieR: Automata was first released for PlayStation 4 in Japan on February 23, 2017, with North America following on March 7 and Europe on March 10. The Steam version released worldwide on March 17.
Square Enix has also uploaded a new celebratory trailer in recognition of reaching the milestone.
Square Enix previously announced 1 million shipments & downloads for the game in April 2017 and 2 million in September of that year. You can read our glowing review here.