The Witcher 3
Geralt takes on an Ice Giant in The Witcher 3.CD Projekt RED

CD Projekt Red has announced that its open world fantasy RPG The Witcher 3: Wild Hunt has sold more than 4 million copies on PS4, Xbox One and PC in just two weeks on sale.

In October 2013 the studio revealed that the previous games in the series – The Witcher, its Enhanced Edition, The Witcher 2: Assassins of Kings on PC and its later conversion to Xbox 360 – had sold a combined 6 million units in a six-year span.

The comparison makes the game's success now all the more remarkable.

"Four million RPG fans spending their hard-earned money on our game is a sign that we did something right," said CD Projekt Red's co-founder Marcin Iwinski in a statement. "You can be sure that we'll harness all that positive energy and make the upcoming expansions worthy of the grand adventure that you're telling us Wild Hunt already is.

"Until then, keep on enjoying Wild Hunt, do not forget to grab your weekly set of free DLCs, and stay tuned for constant updates and enhancement to the game we are continuously working on."

To date six of the planned 16 of free DLCs have been released for the game.

After its first week on sale, The Witcher boasted a top spot in the UK video game chart, improving on the sales of The Witcher 2 by an enormous 608%. It is currently the fastest selling game of 2015 in the UK so far.