Each resource has a die rating measuring its potency, from d4 to d12, a domain it belongs to, and sometimes a tag.

It used to be a slightly more sensible place, before an overambitious engineering project of the aelfir ruptured the Heart 150 years ago, causing it to spew its weirdness far and wide. Much like in Spire, failure and success at a cost give the character stress in one of five tracks: Blood, Echo, Mind, Fortune, and Supplies. They change themselves through illicit surgeries, taking a little bit of the Heart into their own bodies, giving them strange and unusual abilities. The player characters are the ones desperate, driven, or deranged enough to take the Heart up on this promise.Resources, however are also linked to a specific Domain - a Haven d6 resource might be a pouch of coins, whereas an Echo d8 resource might be the organs of a Heartsblood beast, or scrapings of the edritch mould growing on the walls of a long-abandoned Vermissian station. which would go in the Hype Machine, ask specific questions with strong prompts, just like a normal thread does. But sometimes they too fall, and by the point they've ended up in the City Below, they've adjusted to no longer being on top of the heap. One of the reasons for this rule was giving meaning to delve items: grappling hooks, compasses, air-tanks, etc. Gnolls are the hyena-headed people of the far south; a nation with advanced technology built of their mastery of demonology, that's currently fighting an on-off war with the Aelfir.

Two Minor Fallout effects can be combined (with the agreement of player and GM) into a Major Fallout. They say when manifest it is unusually cunning, deceitful and stealthy, and that it infects those around it to grow and replicate. Everything is done very professionally with this company and always lets you know every step of the process.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. A character’s health is a pool, but so is their sanity, so is their resistance to the corrupting influence of the Heart, so are their financial resources. And in the end you'll either become one with the Heart, or tear its connection to you from your body, severing the link. These stories help keep us safe because they help keep us sane and connected despite not being able to go outside and see our friends and family.