Before you download Assassins Creed SKIDROW here the system requirements:
Assassins Creed: Revelations Minimum System Rquirements
*OS: Windows XP/ Windows Vista/ Windows 7
*Processor: Intel® Core 2 Duo E4300 1.8 GHz / AMD Athlon 64 X2 4600+ 2.4 GHz
*Memory Ram: 1.5 GB Windows XP / 2 GB Windows Vista and 7
*Hard Disk Space: 12 GB free
*Video: 256 MB @ DirectX® 9.0c compliant video card with Shader Model 3.0 or higher is better.
*Sound Card: DirectX Compatible
*DirectX: 9c
*Network : Broadband Internet Connection
*Keyboard / Mouse
*Installation: DVD-Rom Drive
*Processor: Intel® Core 2 Duo E4300 1.8 GHz / AMD Athlon 64 X2 4600+ 2.4 GHz
*Memory Ram: 1.5 GB Windows XP / 2 GB Windows Vista and 7
*Hard Disk Space: 12 GB free
*Video: 256 MB @ DirectX® 9.0c compliant video card with Shader Model 3.0 or higher is better.
*Sound Card: DirectX Compatible
*DirectX: 9c
*Network : Broadband Internet Connection
*Keyboard / Mouse
*Installation: DVD-Rom Drive
*Release Date: 11.2011
Assassins Creed: Revelations Recommended System Requirements
*OS: Windows XP/ Windows Vista/ Windows 7
*Processor: Intel Core 2 Duo E7300 2.66GHz / AMD Athlon 64 X2 6000+ 3.0 GHz or better
*Memory Ram: 4 GB
*Hard Disk Space: 12 GB Free
*Video: nVidia GeForce GTS 250 / ATI Radeon HD 5670 512MB
*Sound Card: DirectX Compatible
*DirectX: 9
*Keyboard / Mouse
*Installation: DVD-Rom Drive
*Processor: Intel Core 2 Duo E7300 2.66GHz / AMD Athlon 64 X2 6000+ 3.0 GHz or better
*Memory Ram: 4 GB
*Hard Disk Space: 12 GB Free
*Video: nVidia GeForce GTS 250 / ATI Radeon HD 5670 512MB
*Sound Card: DirectX Compatible
*DirectX: 9
*Keyboard / Mouse
*Installation: DVD-Rom Drive
Here the Download link: