AI DM that understands
Forged in the Dark.

The FitD design philosophy

Forged in the Dark (FitD) is the framework John Harper built for Blades in the Dark — a game about a crew of scoundrels running scores in a haunted industrial city. The mechanics are built around a simple truth: when you are doing something dangerous, you are always in a position (controlled, risky, desperate) and working toward an effect (limited, standard, great). The combination determines your risk and what success looks like.

Stress is the resource that makes FitD tick. Spend it to push yourself, to resist consequences, to fuel a flashback. When you hit 9 stress, you take trauma — a condition that changes how your character behaves. This creates a beautiful feedback loop: the better you are at doing dangerous things, the more you expose yourself to lasting damage.

The score structure — planning phase, engagement roll, operation, fallout — gives FitD sessions a predictable dramatic shape that produces tight fiction fast. If you want heist mechanics, crew dynamics, and consequences that linger, this is the framework.

Games you can playtest with SagaForge

FitD has spawned a growing family of games built on the same core structure — position/effect, stress, flashback, and scores:

• Blades in the Dark — the origin. Crew-based scoundrels, faction clocks, a haunted city called Doskvol. The definitive FitD game.
• Scum and Villainy — Blades in space. Three ship frames, rival crews, a galaxy of desperate jobs.
• Nerves — body horror in a FitD framework. Your body is the resource; you spend it to do impossible things.
• Wildsea — post-apocalyptic sea voyage in a world covered by an overgrown forest. Weird and gorgeous.
• Heart: The City Beneath — delve into a horrific subterranean city below a ruined world. Spelunking with consequences.
• Trophy Dark — dark fellowship of treasure hunters descending into a cursed crypt. Loot or die.
• Band of Blades — military fantasy on the retreat. Run a retreat, protect the Legion, survive the day.
• Hack the Planet — eco-activist hackers fighting climate collapse. FitD mechanics applied to activism.

All share the position/effect core, stress tracks, and score structure — but each generates wildly different fiction.

You do not need a table full of players to find out if your rules work

FitD games are mechanically dense in a way that is easy to underestimate. The engagement roll, the effect clock, the trauma track, the crew sheet — they all interact in ways that only become obvious under play. A score that looks clean on paper can stall when the crew has no downtime to recover stress, or when their heat is too high and the city is hunting them.

Playtesting FitD alone is brutal. The system rewards a human GM who can read the table and make judgment calls about position. Without that, it is easy to either: over-apply the rules and kill the pace, or under-apply them and lose the mechanical tension that makes the fiction land.

SagaForge runs FitD natively. It tracks position and effect, narrates flashbacks, and applies stress and trauma correctly. Paste your rules — or pick a preset — and get a 10-action session with notes on where the mechanics jammed or sang. 90 seconds.