I like those diagrams so much that I feel lonely about it, and I was getting so irritated with being too personally talky during labs. that I was pleased to find the solution to both. "Bring your own," I said, and led a little curriculum through making them.
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That's four role-playing games, from 1984, 1998, 2003, and 2012. Each one is strikingly different from other games of its respective publishing era - at the very least interesting and ambitious, and in my view, worth a lot more than "at the very least."