Boardgamegeek https://boardgamegeek.com/boardgameexpansion/138896/neuroshima-hex-sharrash
English - Sharrash is a mysterious and well-organized community of mutant rats endowed with inhuman intelligence. They live underground, in tunnels and canals of the destroyed cities, along with degenerate humans and mutants who serve the Sharrash. They do not allow strangers anywhere near them and fiercely defend their nests, and their fighters will not hesitate to give their life for the pack.