Night of the Cockroach

From Introduction:

A group of [Traumaville] residents face off with Nature Gone Wrong, as hordes of giant, mutant man-eating cockroaches descend on their charming, peaceful community. Eventually taking refuge in a restaurant, the players need to make a stand against the forces of nature while trying to find a way to destroy the mutant insects (mutated by the government nuclear testing site out in the county). This is a “swarm”-type of scenario to be played in the tradition of Willard, Empire of the Spiders, Them! and similar fare.