So there was this idea posted over here about averaging gameplay. The basic idea is too take a variety of runs of a video game, like completing World 1-1 of Super Mario Bros, played by a bunch of people, and merging the results to get some sort of median gameplay. To see "how people, on average, react to that first goomba" as the author puts it.
It struck me as an interesting concept... but complicated and with many pitfalls.
But after some thought I considered a simple solution...