What do the buildings in our imagined cities and towns look like?  There were practical reasons why ancient places looked like they did, and understanding some of these can give character to different parts of the world.

Quest-style adventure design considered in Game Ideas Unlimited:  Flag Captures is reconsidered under a more linear model.

Practical methods of creating armies for use in play make the dream of a great, grand, and glorious battle a bit more attainable.

Even in our modern world, food spoilage can be a problem.  As a game complication it offers some interesting possibilities.