Deep underground, a motley cast of rodents, insects, and other vermin sail the treacherous streams of human refuse aboard bizarre vessels in search of discarded booty. Their scheming, backstabbing, and booty-hauling comes to life in The Sewer Pirats, a whimsical treasure hunt for two to five players featuring 30 detailed pirate figures and a rich assortment of game boards, tokens, bases, and cards.