Original Edition Delta: Book of War

A simplified implementation of several elements of the venerable Chainmail system, this fantasy game is fast to set up and finishes in an hour or two. It's not deep, but would be a sensible choice for the combat engine of a larger strategic campaign system or to resolve RPG battles. It could also provide the skeleton for a set of house rules.

Incredibly thoughtful up-scaling of old school DnD to pitched battles. Dan worked really hard to make the stats match across scales. I followed its development on the blog Deltasdnd.blogspot.com, and anyone interested in the product should go read up on it there. Not complicated, free of bloat, and provides a very DnD atmosphere.