PC Requirements

Minimum:

• OS *:Windows Vista
  
• Processor:2 GHz Dual Core
  
• Memory:2 GB RAM
  
• Graphics:NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater
  
• DirectX®:9.0
  
• Hard Drive:20 GB HD space
  
• Sound:DirectX Compatible
  
• Other Requirements:Broadband Internet connection
  
• Additional:Initial installation requires one-time internet connection for Steam authentication; software installations required (included with the game) include Steam Client, Visual C++ 2008 Redistributable, DirectX and Microsoft .NET 4.

Mac Requirements

Minimum:

• OS: 10.8.5 (Mountain Lion)
  
• Processor: 2.0 GHz Intel Core 2 Duo (Dual-Core)
  
• Memory: 4 GB RAM
  
• Hard Disk Space: 20 GB
  
• Video Memory: 256 MB
  
• Video Card: AMD HD4000 / NVIDIA 9000 Series (See NOTICE for details)
  
• Additional: Broadband Internet Connection.
  
• NOTICE:The following graphics cards are not supported: ATI X1xxx series, ATI HD2xxx series, Intel GMA series, NVIDIA 7xxx series, NVIDIA 8xxx series. The following cards require you to have 8GB of system RAM: NVIDIA 320M, NVIDIA 9400 and Intel HD3000.

Linux Requirements

Minimum:

• OS: Ubuntu 14.04 (64 bit required)
  
• Processor: 2GHz
  
• Memory: 4GB Memory
  
• Graphics: 512MB*
  
• Hard Drive:16GB HD space
  
• Other Requirements: Nvidia 600 series+, AMD 6000 series+, Intel Iris Pro.
  
• IMPORTANT: Requires 64bit OS to play.