Amazon and Walmart made headlines this week by matching each others deeply discounted book prices.  It looks like the war has now shifted to video games!

Earlier today, Walmart began offering a free $20 gift card w/ Call of Duty Modern Warfare pre-orders.  In response, you can now pre-order Call of Duty: Modern Warfare 2 (PS3/PC/Xbox 360) and get a $20 video game credit at Amazon as well!

The Prestige edition is back in stock and they are currently offering a $10 Amazon credit.

Call of Duty: Modern Warfare 2 releases on November 10, 2009, and release day delivery is also available as well!

FYI - Amazon notified us that this offer will be extended to all existing pre-orders.

Check it out:  Amazon - Call of Duty: Modern Warfare 2