I should disclaim this entry by saying that many NES games continue to be wonderfully playable to this very day, but ideally through the medium of an emulator, which lets you save your game progress whenever you choose. If you were forced to spend a week with the original Nintendo and its fine library of games, then you'd find yourself unable to switch off the console for fear of losing your precious, fragile game progress. You'd also be surrounded by scrap bits of paper with tons of level codes jotted down on them, making your room look like that of some conspiracy hack trying to work out whether stock market figures reveal the co-ordinates of the Reptilians' underground lair. Such a prospect is unthinkable to us today, as we need our game progress saved, quick-saved, checkpoint, and preferably backed up to the cloud where we know it's safe.