You can register retail copies of MW2 on steam

[crazydog]

This means if you want to buy MW2 elsewhere, say, Newegg for $54 instead of $60 (http://www.newegg.com/Product/Product.aspx?Item=N82E16832133066), you can register this copy on steam and have it added to your account.

http://forums.steampowered.com/forums/showthread.php?t=995300

[Hitman Smurf]

The one thing they do right...but still not enough.

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