I have this notion for a GURPS Black Ops campaign (cinematic action with obscenely capable characters), but I'm not entirely sure how to make it sufficiently challenging.
The outline is, the zombie apocalypse is breaking out with some help, and only the Ops and the Company stand between humanity and ...not. What I'm not sure of, is how to make such a campaign believably challenging; each character is worth more in character points than Superman, and the worst of them are crack shots. (No superpowers/magic, limited or no psychic powers, but cinematic gadgeteering is possible.)
Obviously, hopelessly outnumbered civilians and a race against the machinations of the being using the zombies as tools are major conflicts, especially for Ops from the two (of five) departments who have a responsibility to save civilian lives. I'm also planning to use new-Dawn of the Dead style fast zombies to up the danger level.
My current plan is also to develop things slowly, with anti-outbreak missions, investigations, suppression-of-evidence missions, some internal Company politics, and maybe even side missions against rogue psychics/giant cockroaches/the Greys. If the players don't get it fast enough, things would go downhill from there.
How do you challenge ultimate cinematic badasses with zombies? Or should this be recast as a military game instead?