The system requirements are the basic specifications a PC will need to properly run Crusader Kings II. A PC that doesn't meet the specifications may not be able to run the game, or only poorly. For a smoother experience and faster loading, PCs ought to be well above the system requirements. The hardware requirements depend on the type of operating system the PC is running.
Microsoft Windows
The game shipped with Windows support.
- Operating system: Windows 7 64-bit
- Processor: Intel® Pentium® IV 2.4 GHz or AMD 3500+
- Memory: 2 GB RAM
- Hard disk space: 2 GB
- Video card: NVIDIA® GeForce 8800 or ATI Radeon® X1900, 512mb graphics memory required.
- DirectX®: 9.0c
- Sound: Direct X-compatible sound card
- Additional: 3-button mouse and keyboard
Mac OS X
A Mac OS X version of Crusader Kings II was released on May 24, 2012.
- Operating system: Mac OS X 10.9 or later
- Processor: Intel Core Duo Processor (2 GHz or better)
- Memory: 2 GB RAM
- Hard disk space: 2 GB
- Video card: ATI Radeon HD 6750/NVIDIA GeForce 320/NVIDIA GeForce 9600 or higher
With patch 3.3 the game switched to a 64-bits executable, allowing support for Mac OS Catalina.
Linux
A Linux version of Crusader Kings II was released on January 14, 2013.
- Operating system: Ubuntu 14.04 LTS
- Processor: IntelR PentiumR IV 2.4 GHz or AMD 3500+
- Memory: 2 GB
- Hard disk space: 2 GB
- Video card: ATI Radeon HD 6750/NVIDIA GeForce 320/NVIDIA GeForce 9600 or higher, 1024MB graphics memory required.