Amazon had a deal on this game a few days ago and although this one is about $2 more it is still a great buy. Games Rocket are a legitamate website, in case you had not purchased games from them before
Please also consider using my affiliate link!
http://www.gamesrocket.com/download/The-Darkness-II.html?ref…
A comparison of the bigger cd key sellers showing prices.
http://cdkeyprices.com/product/The-Darkness-2-CD-Key-Steam.h…
Can confirm this works just bought 2x of them, got the keys in about 30secs. thanks!