Pre-sales of Valve's zombie shooter Left 4 Dead (PC and Xbox 360) are outperforming those of the company's hit game collection The Orange Box by nearly twofold, according to the developer.

"Pre-orders are now running 95% over those of The Orange Box, and we're getting set to launch the pre-release demo and television campaign to further fuel this momentum," said Valve marketing VP Doug Lombardi in an official release.

The question now is: Will Left 4 Dead be the number 1 game of 2008?