Only the single-player campaign is playable at this stage, as it's still so early that the multiplayer servers have not been activated yet.
Players can expect spoilers from the highly-anticipated adventure game to proliferate online over the coming weeks, as Naughty Dog creative director Neil Druckmann warns:
Uncharted 4 is just two weeks away! As we get closer it'll get harder and harder to control leaks. Stay vigilant. Big surprises in store.