Command and Conquer 3: Tiberium Wars (GDI Campaign Part 6) 

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SYSTEM REQUIREMENTS
OS *: Windows XP/Vista
Processor: 2GHz AMD Athlon™ processor or equivalent
Memory: 512MB RAM
Graphics: ATI Radeon 8500 or Nvidia GeForce 4 or higher video card
Hard Drive: 8GB
Sound: DirectX 9.0c-compatible sound card