First of all came a promise from Valve, saying that a demo version of the game will soon become available for both PC and Xbox 360 gamers. Until then, the Steam company unveiled the system requirements of the game.

– CPU: 3.0 GHz P4, Dual Core 2.0 or AMD64X2 (or higher)
– RAM: 1 GB for XP / 2GB for Vista
– DVD-ROM Drive
– HARD DRIVE: At least 7.5 GB of free space
– VIDEO: Direct X 9 compatible video card (Video card must be 256 MB or more and should be a DirectX 9-compatible with support for pixel shader 2.0)
– SOUND: Direct X9.0c compatible sound card
– OS: Windows Vista, XP or 2000

Left 4 Dead will be released on November 20.