6. Sunny Plays Penguin Adventure (MGS 4)
https://www.youtube.com/watch?v=hYxT4AfiTMI When Guns of the Patriots was first being demoed, fans remarked how awesome and meta it was that Snake's controller for the Metal Gear Mk II was a tiny DualShock, and it's a notion the full game would deliver on again - except in a far more subtle way. At numerous points in the story you'll be left to explore the Nomad aircraft, to which each character therein has their own pre-scripted animations to be getting on with. Otacon checks in on his emails, whilst Sunny does a number of things from attempting to cook eggs, to whipping out her PSP and playing Penguin Adventure. The first game Kojima would have a hand in developing it's a perfectly subtle little nod to his past and future colliding, and although you can't get hands on it yourself, Sunny plays through the Ice Path level for quite some time - its adorable chiptune soundtrack also being audible throughout.