With 40 million PlayStation 4 consoles sold, you'd think the more business-minded folk at Sony would have scuppered development on Uncharted 4: A Thief's End. Considering how well the console has performed commercially without the presence of a big exclusive game, why even bother making one? After all, isn't that why the Uncharted games are called system sellers? Thankfully, the value of content isn't lost on the company and neither is Uncharted 4. And for that series fans should be grateful.