ps4Sony scores another big milestone for the PlayStation 4.

Since the PlayStation 4 went on sale less than two years ago, Sony has sold 20.2 million units, making the game console the company’s fastest-selling videogame console ever, the company said yesterday.

The PlayStation’s stellar performance has been no secret.

It outpaced Microsoft in U.S. console sales for ten consecutive months until November, at which point Microsoft dropped the price of the Xbox One. As of January, it was again the top selling console, having sold 18.5 million units since its November 2013 launch.

But still, to outsell all other PlayStation consoles is surprising. Competition today not only comes from other consoles, but alternative gaming devices, like smartphones, which offer tons of free game play with fewer constraints. It’s those threats that drive fears by console-makers about building the next generation of hardware.

To keep the momentum going for the PS4, Sony promises a strong line-up of games to come, including Batman: Arkham Knight and Uncharted 4: A Thief’s End.

While it took less than a year and a half for Sony to sell more than 20 million units, it took two years and eight months to sell that many units of the original PlayStation, and a year and seven months for the second version. Sony never disclosed figures for PlayStation 3, according to the WSJ.

As for the performance of competing consoles, Nintendo has sold 9.2 million units of the Wii U as of December, and Microsoft has sold 10 million units of Xbox One ending in November.

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