Activation Key/Code????

[rezde6]

Hello everyone, I am new to Steam. I just bought this game and when I wanna start playing it, it asks me for an activation code.....where am I suppose to find this information?
Thanks guys

[dja]

Go into your library, select Bioshock 2, and on the right hand side there should be something like: STORE PAGE, ETC and there is CD KEY, you click on that and you'll get the CD key.