Game idea
The scene is something like any of the classic FPS-style abandoned industrial facilities -- only instead of having to shoot people and wreck things you tidy it up, make it habitable, decorate it, and then entice all your friends to live there with you.
In Phase II, you make the place self-sustaining with agriculture and a solar/battery power system.
In Phase III, you revive the old manufacturing equipment and use it to develop a space program. Or a subway system. Or something.
Game idea
@green I always find those shooter-games so disappointing (which is why I almost never play them) -- I want to *build*, not destroy.