Call of Duty 4 to be the Best Selling Shooter Ever

[naznatips]

Cheetos1 said:
Hmm I thought Half life ONE sold between 8 and 10 million but that is maybe to retailers.

 http://vgchartz.com/games/game.php?id=7278 assuming VGC's historical data is reasonably accurate, 7.85 million.  It hasn't been passed yet, but obviously it will be soon.