Assasins Creed

Supported OS        : Windows XP / Vista (only)
Processor               : Dual core processor 2.6 GHz Intel Pentium D or AMD Athlon 64 X2 3800+ (Intel Core 2 Duo 2.2 GHz or AMD Athlon 64 X2 4400+ or better recommended)
RAM                     : 1 GB Windows XP / 2 GB Windows Vista
Video Card            : 256 MB DirectX 10.0–compliant video card or DirectX 9.0–compliant card with Shader Model 3.0 or higher (see supported list)*
Sound Card           : DirectX 9.0 or 10.0 compliant sound card (5.1 sound card recommended)
DirectX Version   : DirectX 10.0 libraries (included on disc)
DVD-ROM: DVD-ROM dual-layer drive
Hard Drive Space: 8 GB
Peripherals Supported: Keyboard, mouse, optional controller (Xbox 360 Controller for Windows recommended)

*Supported Video Cards at Time of Release:
ATI RADEON X1600* / 1650*-1950 / HD 2000 / 3000 series
NVIDIA GeForce 6800* / 7 / 8 / 9 series
*PCI Express only supported

Download :

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8
Part 9
Part 10