Minimum System Requirements
Windows
OS:
Windows XP or later
Processor:
1.2GHz processor
Graphics:
Graphics Card that supports Pixel Shader 2.0 and Vertex Shader 2.0(Vertex Shader Support can be supported with software emulation)
Storage:
500 MB HD space
Notes:
9.0
macOS
OS:
OS X version Snow Leopard 10.6.3, or later.
Processor:
2.0+ GHz
Memory:
2 GB RAM
Graphics:
OpenGL 2.1 and shader model 3 with 512 MB of memory.
Storage:
500 MB HD space
Notes:
Not recommended for Intel integrated graphics, Mac Mini's, or early generation MacBooks
Linux
OS:
Major Linux Distributions from 2010
Processor:
2.0+GHZ
Memory:
2 GB
Graphics:
OpenGL 2.1+
Storage:
500 MB HD space
Recommended System Requirements
Windows
OS:
Windows XP or later
Processor:
1.4GHz processor
Graphics:
Graphics Card that supports Pixel Shader 3.0 and Vertex Shader 2.0(Vertex Shader Support can be supported with software emulation)
Storage:
500 MB HD space
Notes:
9.0
These are the requirements the publisher lists on Steam.