Summary: Despite Call of Duty 4: Modern Warfare being available on Steam, and the UK Amazon site selling the Steam version of this game. This Amazon.com version DOES NOT SUPPORT STEAM If you try to redeem the CD key in Steam it will give you an "Invalid Product Code" message.
CODE WILL NOT WORK WITH STEAM ACTIVATION ON WINDOWS PC.
1 April 2014
Summary: The game is good but DO NOT i repeat DO NOT buy this game if you are looking to activate it on steam with a Windows PC. i got lucky and was able to get a refund thanks to amazon's great customer service
Summary: I bought this for my 2009 macbook pro with 2.4ghz. Works great, but when I downloaded the 1.7 patch, the broadcast, creek, carentan maps do not work. It's a bummer but I still play this game a lot.