Hellfire

Hellfire is a set of 1/300th (6mm) scale rules for Science-Fiction tabletop warfare (yes, another set!). Where Hellfire aims to be different is in that it is intended not only to be a generic game, but allow you to play a variety of different types of SF games, whilst managing to capture some form of unique flavour that makes the game more than just WW2 with las-cannons.
Hence I am aiming at producing battles in a universe which isn't overly militarised. It is a universe where the black sheep of the family returns with a battalion of genetically engineered warriors he has hired, to be met by the family who have called out an ad hoc local militia. It is a universe where most armoured vehicles are improvised on site. Doubtless towards the Galactic Core titanic battles rage where the resources of star systems are flung at each other in cataclysmic struggle, however round here we restrict ourselves to police actions and border skirmishes.
The reason I haven't provided any background is that these rules are generic, clone warriors can battle with Yrchknight Hort riders, ECM troopers can jam guided missiles launched by power armoured space marines, whilst infantrymen hunkered down in cover can exchange fire with aliens.