Call of Duty 4: Modern Warfare will be 40% off for Steam’s Weekend Deal. This brings the price of the popular PC game to $23.99 from $39.99. COD4: MW has both single-player and multi-player modes and was released November 2007.

If you haven’t had a chance to pick up the game yet, or are not planning to buy Modern Warfare 2, this weekend at this price is a great time to do it.

http://store.steampowered.com/app/7940/