Either someone at Sony pressed the wrong button again, or Sony is paving the way for the reveal of Uncharted 4 at E3, as the “Single Player” version of Uncharted 3: Drake’s Deception is now free for all PSN members in the US store. This is the same version of the game that was previously free for PlayStation Plus members only.
You can download it here, and it might be wise to hurry, just in case, since it could very well be another mistake. It’s also worth mentioning that it’s a rather big download, so you may have to make room in your hard disk in order to play it.
Of course, since PlayStation Plus isn’t needed, if you don’t live in the US you can just make an US account and get it anyway. Miracles of a globalized world.