PC Digital Download - If you missed the Steam sale for the Call of Duty Modern Warfare 1 & 2 games, you can get them a little cheaper using a refer-a-friend code at Direct2Drive for:
Call of Duty - Modern Warfare - $14.99 ($12.74 refer-a-friend)
http://www.direct2drive.com/5239/product/Buy-Call-of-Duty-4:-Modern-Warfare-Download
Call of Duty - Modern Warfare 2 - $19.99 ($16.99 refer-a-friend)
http://www.direct2drive.com/8687/product/Buy-Call-of-Duty:-Modern-Warfare-2-Download
Only CoD: MW2 can be activated on Steam.
FYI DLC is not on sale.
Call of Duty - Modern Warfare - $14.99 ($12.74 refer-a-friend)
http://www.direct2drive.com/5239/product/Buy-Call-of-Duty-4:-Modern-Warfare-Download
Call of Duty - Modern Warfare 2 - $19.99 ($16.99 refer-a-friend)
http://www.direct2drive.com/8687/product/Buy-Call-of-Duty:-Modern-Warfare-2-Download
Only CoD: MW2 can be activated on Steam.
FYI DLC is not on sale.