Yahoo Videogames now has the Call of Duty 4 demo available for download. The demo is 1.4Gb and features a full level of the single-player campaign. This mission has you fighting through a Middle Eastern town beset with insurgents, as you try to free a trapped tank from a bog that it’s become mired in. Since Call of Duty started out as a PC franchise, this demo is a nice little nod to the fan base that supported the series in the first place.
