I pre-ordered the game on the 10th so I could get the early access, and I've been playing since the 11th up till now. I got an email a few days ago saying that SE shipped my game, what I'm curious about is, since I'm playing right now, what do I need the actual disk for, if anything? Once I receive my game, could I give it to a friend if I wanted? Or is there something that I need it for?