Ok, so the PS3 version comes with Steam, what does that actually mean in practice? Do I have to enter a CD-key and register it with a Steam account before I can play it (thus making the game not resellable)? Or is Steam optional and just used to handle the download of Add-Ons? Can the game be used without a Steam account?
Portal 2
Game » consists of 20 releases. Released Apr 19, 2011
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