I came across The Evolution of Trust a few years back, and the game's always stuck in my mind since then. It's an interesting little experiment. It uses simple diagrams and characters to illustrate its point, and raises some important questions. How do we learn to trust people, and when does this cycle break? How does miscommunication, people who are inherently dishonest, or copycat behavior change this? It's something that's worth a play for not only the freedom of being able to use all kinds of sliders in the sandbox mode to run simulations, but how you can interpret its message.