Minimum System Requirements
Windows
OS:
Windows XP (Service Pack 2)
Processor:
1.5Gz Dual Core Processor
Memory:
2 GB RAM
Graphics:
DirectX 9.0c Shader Model 3 Compliant Graphics Device
Storage:
600 MB available space
Notes:
Version 9.0c; XAudio 2-Compatible Sound Card
macOS
OS:
OS X 10.6 (Snow Leopard)
Processor:
1.5Gz Dual Core Processor
Memory:
2 GB RAM
Graphics:
Intel HD Graphics 3000 256MB or better
Storage:
650 MB available space
Linux
OS:
Ubuntu 12.04 (if using Ubuntu)
Processor:
1.5Gz Dual Core Processor
Memory:
2 GB RAM
Graphics:
OpenGL 2 with Framebuffer support
Storage:
650 MB available space
Notes:
Glibc version 2.15
Recommended System Requirements
Windows
OS:
Windows 7
Processor:
2.2Gz Dual Core Processor
Memory:
4 GB RAM
Graphics:
DirectX 9.0c Shader Model 3 Dedicated Graphics Device
Storage:
600 MB available space
Notes:
Version 9.0c; XAudio 2-Compatible Sound Card
macOS
OS:
OS X 10.8 (Mountain Lion)
Processor:
2.2Gz Dual Core Processor
Memory:
4 GB RAM
Graphics:
Intel HD Graphics 3000 256MB or better
Storage:
650 MB available space
Linux
OS:
Ubuntu 13.04 (if using Ubuntu)
Processor:
2.2Gz Dual Core Processor
Memory:
4 GB RAM
Graphics:
OpenGL 2 with Framebuffer support
Storage:
650 MB available space
Notes:
Glibc version 2.15
These are the requirements the publisher lists on Steam.