Assassin's Creed is an action-adventure video game set during the Third Crusade of 1191 in four cities of The Holy Land: Jerusalem, Acre, Damascus and Masyaf, the assassins' stronghold. Altair, the game's protagonist, is a ruthless warrior whose objective is to slay nine historical figures. The PC version of the game features four exclusive investigative missions including:

1. Rooftop race challenge
2. Race to a specified location
3. Archer stealth assassination challenge
4. Defensive mission where attacking archers are killed to protect fellow assassins

1. Supported OS: Windows XP/Windows Vista
2. Processor: Dual core processor 2.6 GHz Intel® Pentium D or AMD Athlon 64 X2 3800+
3. RAM: 1 GB Windows XP / 2 GB Windows Vista
4. Video Card: 256 MB DirectX 10.0–compliant video card or DirectX 9.0–compliant card with Shader Model 3.0 or higher
5. Sound Card: DirectX 9.0 or 10.0–compliant sound card
6. DirectX Version: DirectX 9.0 or 10.0 libraries (included on disc)
7. DVD-ROM: DVD-ROM dual-layer drive
8. Hard Drive Space: 8 GB
9. Peripherals Supported: Keyboard, mouse, optional controller