Heart: The City Beneath RPG - Quickstart Edition
Heart: The City Beneath RPG - Quickstart Edition - Rules of Play says:
Heart: The City Beneath is a tabletop roleplaying game about delving into a nightmare undercity that will give you everything you’ve ever dreamed of – or kill you in the process. It is a dungeon-crawling, story-forward tabletop RPG from the designers of Spire that focuses on what characters have to lose in pursuit of their dreams in the chaotic darkness beneath the world. Sharing a setting with Spire, Heart expands the unreal world beneath it. It uses an expanded and updated version of the Resistance system, the mechanics that power Spire, to help you tell stories of desperation, hubris and adventure in the City Beneath. The Heart quickstart provides you with basic rules, a selection of pre-generated characters and the introductory scenario "Drowned".