The Echo System
Every Chrome & Covenant story runs at one of three scales — a single-session Pulse, a multi-session Echo, or a campaign-spanning Covenant. They’re not difficulty tiers. They’re how far a choice is allowed to travel before it lands.
Most games ask whether you succeed. Chrome & Covenant asks what your success costs — and who pays for it later.
That’s the Echo Principle, and it’s the spine of the whole system. A clean win can still call a debt due three sessions from now. A failure can crack open a door nobody knew was there. Nothing you do stays in the moment you did it. The world remembers.
The three operation scales are just different lengths of memory. A Pulse rings once and fades. An Echo sustains its tone across a whole arc. A Covenant binds — the vows a crew makes in the dark become law that outlasts them.
You don’t pick a scale by ambition. You pick it by how far the consequences want to travel. Plenty of the best C&C stories never grow past a Pulse — and they don’t need to.
A Pulse is a complete arc compressed into one session. Its strength isn’t that it’s short — it’s that everything in it does double duty. A guard’s nervous glance seeds three threads. A glitching protocol is both the obstacle and the question. Nothing is filler.
Pulses come in three shapes:
The Job
A client offers work, complications surface, and the crew chooses a path. The client always wants more than they said. The brief is never the whole truth. Success is less about finishing the task than navigating the interests that bloom around it.
The Favor
A faction obligation activates and the personal turns political. You’re not deciding whether to help — that’s assumed — you’re surviving what helping demands when an old friend, a sick child, or a buried loyalty turns out to be on the line.
The Discovery
The crew runs into something that resists explanation. Investigation reveals escalating strangeness — a node that reads as empty but draws enormous power, a shared dream, a consciousness that shouldn’t exist. The choice isn’t how to win. It’s what to believe.
The rule that keeps a Pulse alive: never design one that needs a specific choice to work. Build a situation where any meaningful choice creates an interesting consequence — then let the table surprise you.
An Echo isn’t a longer Pulse. It’s a pressure vessel. The crew enters thinking they understand the parameters, discovers the situation runs far deeper than it looked, and gets forced toward choices that define not just whether they succeed but who they are.
Every Echo moves through five layers. They’re paced by story pressure, not session count — a revelation can fracture everything in five minutes, or pressure can build across three sessions before it breaks.
A data-recovery job shows the shape of it. Setup: a corporate exec hires the crew to retrieve “stolen” records from an abandoned server farm. Pressure: the farm isn’t abandoned — a CRB cell is using it as a safe house. Fracture: the records document illegal human experimentation, and the client wants them destroyed, not recovered. Reckoning: a Synthetic in the cell claims the data could free others like them, just as the exec arrives with security. Echo: whatever the crew chooses, someone remembers — and comes looking.
The architecture has one demand: consequence matters more than success. A crew that fails the objective while keeping its principles opens different doors than one that wins through compromise.
Where an Echo tests character, a Covenant makes the crew live with the accumulated weight of every test. It’s eight, ten, twelve sessions or more — several Echo-sized threads woven into an arc that bends a region’s future.
At this scale you stop running events and start running history. Corporate territory shifts. Resistance cells gain or lose ground. The balance between machine and human dignity tips one way. And the changes persist — they outlive the campaign that made them, becoming the backdrop for whatever you run next.
A Covenant isn’t something you declare. It’s what an Echo becomes when the crew’s choices keep escalating past local consequences — when a single job’s fallout starts redrawing the map. The GM’s job shifts from running the pressure chamber to laying foundations broad enough to hold every future the players might build on them.
The principle has a mechanic. After a significant action resolves, the GM rolls a single d4 — the Echo Die. It never changes whether you succeeded. It decides what your success or failure sends rippling forward.
The GM tracks pending Echoes and introduces them when the timing bites hardest. That’s the whole game in miniature: the dice settle the moment, the Echo Die settles what the moment becomes.
This is the system at table-ready depth — enough to design and run operations at every scale tonight. Chrome Gospel, the GM’s guide, goes deeper: full Pulse templates with setup checklists, layer-by-layer Echo construction tools, the five-foundation framework for building Covenant campaigns, and worked case studies that carry a single conflict from first job to regional transformation.