I'm currently in a game running off delta green. The setting is following a country wide emp with the PCs starting on a highway with their cars shutting off mid drive.
Slow burns till we're setup in a city and the gm introduces a The Thing-esque body snatchers. Now with a whole bunch of civilians the PC are trying to manage and take care off and potentially a body snatcher in the midst its got the majority of us in a state of suspense. Very good so far besides very frequent scheduling issues