Operating System: Windows XP / Vista / 7
Processor: Pentium 4 2.4 GHz or equivalent Athlon performance
Memory: 1 GB of RAM
Graphic: NVIDIA GeForce 6600 GT or better / ATI Radeon X1300 or better 128 MB with Pixel Shader 3.0 support
Sound Card: Sound device compatible with DirectX ® 9.0
Hard Disk Space: 8.0 GB available 

Link Download :

Part 1 

Part 2

Part 3

Part 4

Part 5

Part 6

Part 7

Part 8

Part 9