When Worlds Collide: 80s Survival horror modern fantasy
September 1980. You wake up in a strange place, some kind of massive facility, with no idea how you got there and nobody to ask. Most of the place looks like bleeding edge 1980s technology, but other parts seem old, very old, impossibly old.
While the only people you seem to be able to find are your fellow captives, you're sure that there's something in the darkness, waiting, listening, stalking you...
That's the basic pitch, though I've got a lot to fill out and develop. Players aren't amnesiacs... they just can't remember how they got there. Shades of Cube, anyone?
The PCs might be:
* Average Joes from different walks of life
* Plucky kids (as per Stranger Things/Goonies/etc)
* Some other grouping maybe
without anything obvious connecting them; working out *why* is as big a deal as *how*
Survival is the obvious goal. I'd leave "investigating what happened" as an exercise for inquisitive players; clues will abound, if you bother looking for them.
System:
Not freeform. Homebrew. Black box. I'll ask you a bit about your PC, work up a sheet behind the scenes, keep all the mechanics hidden.
Aiming for 3-5 players, with backups in case of attrition. Thoughts, suggestions, questions?