Counter strike - global offensive

When it comes down to it, Counter-Strike: Global Offensive may follow the same old formula of gameplay seen in previous versions of Counter-Strike, but it's still a well-rounded tactical shooter. It may not try anything drastically different or revolutionize the series by taking it in a new direction, but there's still enough there to appeal to newbies and hardcore fans alike.

System requirement : 

OS: Windows 7/Vista/XP /8
Processor: Intel Core 2 Duo E6600 or AMD Phenom X3 8750 processor or better
Memory: 1GB XP / 2GB Vista
Hard Disk Space: At least 7.6GB of Space

Video Card: Video card must be 256 MB or more and should be a DirectX 9-compatible with support for Pixel Shader 3.0

Here is some image : 

Download link (3,37 GB) : 

 part 1

   part 2  

 part 3

 part 4

How to install : 

1.  extract it with winrar or 7zip
2.  open setup.exe to install
3.  after installing open updater to update
4.  play it ! enjoy :)