Assassin's Creed Revelations:

Assassins Creed Revelations Minimum System Requirements

OS: Windows® XP / Windows Vista® / Windows® 7 (only)

CPU: 1.8 GHz Intel® Core™2 Duo E4300 / 2.4 GHz AMD Athlon™ 64 X2 4600+

RAM: 1.5 GB Windows XP / 2 GB Windows Vista, 7

GFX: 256 MB DirectX® 9.0c-compliant video card with Shader Model 3.0 or higher (see supported list)*

DX®: DirectX 9.0c-compliant

HDD: 12 GB of free hard disk space

Audio: DirectX 9.0c-compliant

Other: Windows-compatible keyboard, mouse, optional controller (Xbox 360® Controller for Windows recommended)

Multiplayer: 256 Kbps or faster broadband connection

Internet: Temporary broadband connection required for one-time product registration at first launch, permanent broadband connection required for multi-player.