Re: WH40k Only War with a twist.
I agree that the 'retreat' storyline might make a good story, but it's not exactly what I wanted to try. The idea was for a campaign where the planet it is set on is occupied, its remaining civilian population subdued, and the main battle essentially over. The players would then be the thorn in the side of the occupation forces, conducting sabotage, assasinations, gathering intel for when the Imperium comes back(?) etc with the rest of the resistance/survivors. Perpetually running low on ressources (ammo, weapons, manpower) they would have to be creative to have a chance. As for the enemy I was definitely leaning towards one of the more 'understandable' hostile races, those who would conceivably occupy a planet for whatever reason and not simply cleanse/devour it, the tau, orks, chaos etc.