Papers, Please Reference - Papers, Please, a popular PC indie title, takes place along the border of the fictional country of Arstotzka.

One of them has most of his name obscured on the frame, but it starts with a 'G.' These are references to Guybrush Threepwood, the star of the classic LucasArts adventure titles set on Monkey Island. Then in Chapter 14, you'll see portraits of the founders in Libertalia's bank.

Guybrush Threepwood - As you play through Chapter 11, Nate and Sam will stumble across an unfamiliar portrait of a pirate that has the sigil of a monkey with a poison dagger and an hourglass.

Don't do anything for around 30 seconds and you'll receive a special trophy, which doubles as an Easter egg. Now, as you play Chapter 11, you'll witness the cutscene and then Nathan Drake appears in the familiar location. The presenter had failed to find a controller.

E3 Stage Fright - In 2015, when Naughty Dog was supposed to demo Uncharted 4 at the E3 convention, a cutscene played and then Nathan Drake stood around at the edge of a marketplace, doing nothing.

As Nathan swims around, he'll say 'Marco' and Sam will ask 'Marco What?' This continues the tradition, established in Uncharted 2 and then carried on in Uncharted 3, of making a joke reference to the popular 'Marco Polo' pool game.

Marco Polo Returns! - You can find a hidden bronze trophy by swimming in the water near the sunken pirate ship that you find in Chapter 12.

If you pay attention to the vanity plate on the vehicle, you'll see that it says 'VN373.' Flip that around and it basically reads 'Elena,' a clever little reference to that familiar character.

Vanity Plates - Nathan Drake drives around Madagascar in a Jeep, with Sully and Sam.

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