I ran across an interesting idea from Frostgrave designer, Joe McCullough, called Operation Last Train. The game is a new miniatures game set in a future world, doomed and overrun with voracious predators. Your team of volunteer soldiers are the only hope remaining to the scant survivors left on a planet scheduled for destruction.
What made me sit up and take notice of the project is that McCullough tied the project creation to the charity organization, Save the Children. While the rules are free, I hope that you decide it is worth a few bucks to support the designer’s wishes to use our fun, brutal hobby to do some good around the world. I’ve already donated and I’m starting to read through the rules to see what all it needs. Like a lot of McCullough’s work, it only requires what you have on hand or what miniatures you want to buy.