The Dark Realm is a set of free miniatures rules for Dark Realm’s line of 6mm science fiction games.
Loyal reader Dentatus has contributed a set of free science fiction rules called Dead Run Redux.From the introduction:
Dead Run is a set of science fiction wargame rules. But not the science fiction of Star Wars or Flash Gordon; these worlds are hard, fast and deadly, and you need to be the same. Whether you’re facing down criminal scum, hordes of aliens, killer robots, twisted mutants, or waves of zombies, you just want to get the job done and live to tell about it. Sometimes you’ve got friends along for the ride – Runners they’re called – and sometimes it’s just you. Either way you’ve got to think on your feet and get the first shot off every time, because Runners don’t get too many second chances.
Bughunt is a variant for Steve Jackson Games’ Frag. The game represents a skirmish between space marines and carnivorous aliens.
In the Noonday Sun is a set of rules for small unit actions, derived from another set called Slammer. The authors of Noonday write:
In the Noonday Sun is a set of wargame rules for skirmish games using miniatures. I intended from the start that Noonday Sun would be flexible and adaptable to different scenarios. I have intentionally kept it ‘loose’, particularly in areas like troop motivation and Hollywood heroics. Noonday Sun is meant to be fun! We use miniatures on the tabletop to represent men and women who might well be scared or heroic, angry or bored, professional or just hungry, above all they are unpredictable. When you play Noonday Sun, occasionally try to see things through your troops’ eyes. They are more than just disposable weapons delivery systems.
The Grid Based Wargaming Blog has a set of free wargames rules for company level units using 28mm models and a 6 inch grid.