The Plague, Protocol Game Series 16

The Plague is a story roleplaying game about a nationwide flu that wipes out a considerable portion of the population overnight. Characters must hold up indoors until the CDC gives the all clear to evacuate. But not everyone knows each other and as each day passes, resources dwindle, isolation turns to fear, and paranoia sets in. Can the characters hold out until help arrives?

The Protocol game series uses vignettes, interrogations, interludes, and ensembles to tell a story. Each story explores disparate characters dealing with adversity and isolation in a dramatic fashion. Each game is a zero-prep game for 3 or more players. The game length is exponentially long, so games with more players take more time to complete. You may try playing with only 2 players, but interludes and ensembles (page 4) are pretty much the same at that point.

All Protocol Games are 100% GMless, require almost no preperation time, and use the same game system. There are over 50 games in the series, which means there HAS to be something here for you.