Rats in the Walls

A tabletop roleplaying game of cosmic horror that channels early 20th-century dread and uncanny atmosphere without using established mythos lore. Players create investigators from a simple, flexible ruleset designed to support both one-shot scenarios and extended campaigns; mechanics emphasize quick setup, narrative-driven skill tests, and escalating madness. The default setting evokes the Roaring Twenties, with period details for social interaction and investigation, while optional guidance lets groups adapt the system to other eras, including a medieval appendix. Game flow centers on investigation, scene framing by the referee, and character choices that trade knowledge for sanity as mysteries deepen.