Minimum System Requirements
Windows
OS:
Windows XP
Processor:
2 GHz Dual Core
Memory:
2 GB RAM
Graphics:
NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater
Storage:
4 GB available space
Notes:
Version 9.0; DirectX Compatible
macOS
OS:
OSX 10.6
Processor:
2.0 GHz Intel Core 2 Duo (Dual-Core)
Memory:
2 GB RAM
Storage:
4 GB available space
Linux
OS:
Ubuntu 13.04
Processor:
2.0 GHz Intel Core 2 Duo (Dual-Core)
Memory:
2 GB RAM
Storage:
4 GB available space
Recommended System Requirements
Windows
OS:
Windows 7
Processor:
2 GHz Dual Core
Memory:
4 GB RAM
Graphics:
NVIDIA GeForce 9000 series / ATI Radeon HD 3000 series or greater
Storage:
4 GB available space
Notes:
Version 9.0; Broadband Internet connection; DirectX Compatible
macOS
OS:
OSX 10.8.4
Processor:
2.4 GHz Intel Core 2 Duo (Dual-Core)
Memory:
4 GB RAM
Storage:
4 GB available space
Notes:
Broadband Internet connection
Linux
OS:
Ubuntu 13.04
Processor:
2.4 GHz Intel Core 2 Duo (Dual-Core)
Memory:
4 GB RAM
Storage:
4 GB available space
These are the requirements the publisher lists on Steam.
