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leoaug: i purchase series STALKER on today,now im playing STALKER CoP,i want to play mutiplayer,but it havent cdkey,i cant access the mutiplayer match,the game show Invalid CDkey,so where can i find cdkey for my games ?
Thanks for your help !

We are working on getting everyone the CD keys for multiplayer (you do NOT need a CD key for single-player). As soon as we get the keys, they will appear on your shelf when you click on the game's box.

We apologize for the lack of keys but rest assured we are doing everything we can to get them to you ASAP.