Minimum System Requirements
Windows
OS:
Windows XP SP3/Vista/7/8
Processor:
2.0 GHz CPU
Memory:
2 GB RAM
Graphics:
DirectX 9c compatible graphic card with 512 MB RAM and PixelShader 3.0
Storage:
13 GB available space
Notes:
Version 9.0c; DirectX 9.0c compatible
macOS
OS:
OS X Version Leopard 10.5.8, Snow Leopard 10.6.3
Processor:
2.0 GHz CPU
Memory:
2 GB RAM
Graphics:
NVIDIA GeForce 8 Series or higher/ATI X1600 or higher (Pixel Shader 3.0)
Storage:
13 GB available space
Notes:
Compatible with MacBook Air 2013
Linux
Processor:
2.0 GHz CPU
Memory:
2 GB RAM
Graphics:
NVIDIA GeForce 8 Series or higher/ATI X1600 or higher (Pixel Shader 3.0)
Storage:
13 GB available space
These are the requirements the publisher lists on Steam.