Parable of the Polygons
There are some people who believe that games should stay games and never deal with "real issues", but Parable of the Polygons, by Vi Hart and Nicky Case, shows just how great games can be about getting concepts and ideas across. Billed as a "playable post about the shape of society", Parable of the Polygons talks you through how small biases can have a bigger impact than people think by leading you through a series of puzzles where your job is to make the squares and triangles all happy by shuffling them around until their living conditions are diverse. But not too diverse. Different puzzles have different requirements to make the shapes happy, and over time you see how they grow more and more apart without really meaning to. By starting small and then working through larger puzzles and a few simulations, it talks earnestly and intelligently about how bias impacts society, without ever pointing the finger or addressing any one specific group or cause. Talking about things like this can be hard to do without people feeling as if they're being accused of something and going on the defensive, but Parable of the Polygons is well worth a read (and a play!), and a great example of the way games can get people talking and thinking.