While I’m on the topic of games and IF with educational or persuasive value, I should mention (though I’m not sure how to place it relative to everything else) the State of the Union explorer. It allows the reader/player/experiencer to explore statistical information about the State of the Union addresses, discovering which words gain and lose prominence in political consciousness, and comparing any two specific years in overlay.
Lately I’ve played a few rounds of Electrocity, a simulation game by a New Zealand power company in which the player gets to manage the power supply for a young city. It’s designed to be played by school kids, so the interface is deliberately a bit simpler than for most sim games, but otherwise it basically works in a familiar way: you have various resources, and you can build things (mines, gas wells, airports, hydro-electric plants) and clean them up. At the end of the game, you’re scored on how well you did at building a large population, a clean environment, and a steady power supply.