The 6mm science fiction Yahoo group is very active and has a number of nice rules sets. Maximum Firepower is one designed to be played on a hex grid, and it uses something called the BattleStory system, which it describes as a “universal mechanic that, with the roll of color coded dice, tells you: 1. What orders were issued? 2. How did the troops perform? 3. Who won the battle, and why? 4. What happened to the survivors?