Matryoshka is a narrative-driven tabletop roleplaying game about a group of paranormal investigators working for a secret division of the Soviet Union's military intelligence. Tasked with protecting the Soviet people without their knowledge, agents investigate unexplained phenomena, cosmic horrors, and supernatural attacks from capitalist forces. Encountering ghosts, creatures from Slavic folklore, and Nazi conspirators, they may uncover a larger conspiracy to harness dark forces to overthrow the forces of socialism and plunge the world into fascist darkness. Part of the Powered By the Apocalypse ecosystem, Matryoshka allows for single-session stories with satisfying conclusions as well as longer campaigns that tie together the horrors that players encounter into a web of sabotage and terror from without.