I’m slowly building up a ‘Universe’ in which to set my storyline games. This is an alternate future starting from now and continuing into the far future. Think of something like the Halo universe, or the Startrek, or Warhammer etc. I have some interesting things, but a lot of it has been done before. I think this is okay because even Halo is reusing a lot of older SciFi ideas.
Hopefully I will get a change to base lots of different games within this universe, not just FPS - RTS and RPG are also options.
The way I’m building it is just starting with situations that I would like to exist, and incorporating the necessary events to make it happen. My current list of concepts is:
Large Corporations that own sections of space.
Hyperspace drives.
Artificial Intelligences.
Cybernetics.
Ancient Races.
Space Viruses.
Modern Weapons (gunpowder based).
Laser Weaponry.
Alien Races.
Invasions.
Zombies (maybe?).
Military.