LittleBigPlanet, a game that populates its world by the creative and imaginative player base, forces you to think about games in ways you generally wouldn't by simply playing them.
Every part of your individual level's lifeline is analogous to real game development, especially when your level is released to the general populous that roams the knitted globe, looking for their next challenge. You see, the player count (i.e. product sales) only tallies people who completed your level, and those confused and baffled by your stage won't choose positive tags, leave nice comments or assign hearts (i.e. reviews and metacritic ratings).