Crusader Kings II: Royal Collection Steam CD Key

Windows

OS: XP/Vista/Windows 7
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: Mac OS X 10.6.8 or later
Processor: Intel Core Duo Processor (2GHz or better)
Memory: 2 GB RAM
Hard Disk Space: 2 GB
Video Card: ATI Radeon HD 6750 / NVIDIA GeForce 320 / NVIDIA GeForce9600 or higher, 1024MB graphics memory required

Linux

OS:Ubuntu 12.04 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.