The Witcher 2: Assassins of Kings has now sold 1.7 million copies since launch, developer CD Projekt has announced.

That figure includes sales on both PC and Xbox 360.

To celebrate, the PC version of the game is now on sale for your local equivalent of $29.99 for one week only via GOG. That's a 30 per cent saving.

In other Witcher 2 news, the Xbox 360 version of the game will launch in Japan on 23rd August, with Spike Chunsoft handling publishing duties.

Finally, CD Projekt has also confirmed that a Mac version is in the works, though didn't confirm a release date.