[quote name='AoA']Wait, if I buy this on Amazon, I can download it through Steam and run it through Steam?
Is it obvious how to do this? I barely understand how Steam works.
Also, what would be the benefit of doing it through Steam as opposed to Amazon?
Sorry for all the Q's....[/QUOTE]
not only can you run it through steam, you must!
civ v is a steamworks title... basically it uses steam in place of other drm. i believe (someone correct me if i'm wrong) that you have the option of downloading from amazon or from steam, but either way you'll need to activate it through steam to actually play.