The game has been released as free to play in October 2019, and a sequel, Crusader Kings III, is set to release in 2020. Since being released, it has sold over 1 million copies, which made it Paradox's most successful release before the release of Europa Universalis IV in August 2013. A Linux version was also released on January 14, 2013. An OS X version, Paradox Interactive's first in-house development for the operating system, was released on May 24, 2012. It was released for Microsoft Windows on February 14, 2012. Crusader Kings II is a grand strategy game set in the Middle Ages, developed by Paradox Development Studio and published by Paradox Interactive as a sequel to Crusader Kings.
