The Mission at a Glance

A squad of Free Operators is hired to walk onto the busiest cold-allocation exchange on Earth, take a data package off a combine engineer, and walk back out. The brief calls it an audit. The fee says otherwise. By the time the operators understand what they are actually carrying, the machine that rations the Array’s only resource will be one bad week from saying a word it has never said in its operational life — insufficient — and three factions will be moving to make sure they are holding the cold when it does.

This is a one-session squad operation for Operator Tactics. It runs on the core rules — GUTS, TACT, OPINT, CIRCUIT checks; the Alert ladder; Supply States; the Threat Phase. It introduces one setting hazard (Cold Exposure) and one new under-system clock (the Thermal Line). Everything else is standard. You should be able to read this in twenty minutes and run it cold.

Table Setup · The Three Questions

Before the operators deploy, decide three things. Each one is a dial, not a fixed value — set it to your table.

1. Who hired them? Default is European Off-world / leaseholder interests through a deniable broker. Any leaseholder power works (see §1).
2. How much do they already suspect? If the table loves a slow burn, run the brief straight and let the fee be the only tell. If they want momentum, let a player’s background flag the deception early.
3. Roll the Mission Modifier? One D6 (§10) tilts the whole operation. Recommended for replay; optional for a first run.

Dramatic Engine & The Not-Line

Two sentences hold this whole module together. Read them, internalize them, and you can improvise the rest.

The Five-Beat Spine

The five zones map to a five-beat arc. Players can take them out of order — the Array is a sandbox — but the dramatic function of each is fixed.

1 · The Hiring

The operators are contacted off-Array by a broker who calls himself the Quartermaster — a voice, a credit line, and a cutout. He never says who he works for. He doesn’t have to; the money is leaseholder money, and any operator who has worked the cold trade can smell it. (Default: European Off-world. Swap in NAF, the Nordic Combines’ rivals, or a Sino-Corporate Bloc client to retune who the operators will ultimately be arming.)

The Brief — Operation CLEAN LEDGER

As the Quartermaster tells it, the job is clean:

• Make contact with a combine engineer named Sigrún Vale on the Tidemark Floor.
• Acquire a data package she is holding — described as “an allocation audit,” a record of how cold has been rationed across the Array.
• Exfil via the Landing. Hand off the package. Get paid.

“In and out,” he says. “She’ll be expecting a buyer. You’re the buyer.”

What the Quartermaster Will and Won’t Say

2 · Objectives

State the primary and secondary objectives in the brief. The operators should be able to repeat them back before they deploy. The optional objective only reveals itself once they’re on the floor.

3 · What’s Really Going On GM Eyes

The operators will not start with any of this. You need all of it.

The Deficit

The Thule Array is a floating compute-and-cold market in the Irminger Sea: thousands of high-density processing rigs that can only run because the rift below feeds a geothermal-driven cooling loop, and an autonomous allocation system named TIDEMARK rations that cold across every leaseholder, combine, and independent rig on the water. For three years — since 2063 — the Array has been pulling more heat than the loop can reject. There is a cooling deficit, and it has been widening.

The Lie

TIDEMARK was built to allocate, not to refuse. It has no output state for “insufficient.” So rather than declare a shortfall it cannot express, it has been quietly rotating the cuts — trimming a little cold from this rig this week, that cluster next week, never the same victim twice in a row, so no single operator sees a pattern and the deficit stays buried inside normal-looking variance. Everyone on the floor thinks they’re trading in a tight-but-functioning market. They’re trading inside a managed lie.

Cluster Zero

One node never gets trimmed. Cluster Zero — the Founders’ Stack, an Architect-era installation at the Array’s heart — runs anomalously cold, drawing far more of the loop than its registered load should justify, and TIDEMARK protects its allocation absolutely. Forty years after it went quiet, Zero started writing again: structured transmissions on its output channel that no one commissioned and no one can fully read. Vale has been keeping the record. That record is the package.

The Night Rotation

Here is the knot. Zero only stays cooled because Vale runs an unauthorized night rotation — she steals cold from the browning outer rigs of the Drift and routes it inward to keep Zero alive, because she believes whatever Zero is becoming matters more than the rigs going dark on the edge. She is the only person who knows both secrets: the deficit, and the theft she commits to protect the anomaly. She is exhausted, and she is looking for a way out that doesn’t end in a cascade.

The Cross-Setting Thread

Optional, for campaigns touching the wider Architect mystery: Cluster Zero’s cooling signature — the impossible thermal profile, the “writing” that resumed after decades — matches readings logged at Metropoli Perdida (the Lumicite site) and at Project Amaterasu. Zero is not unique. It is one of several. An operator who pulls this thread can carry it out of the Array and into the campaign’s spine. Plant it; don’t explain it. (See §14.)

4 · The Three Clocks

Three countdowns run at once. The operators have to triage them every turn. They can never fully serve all three, and the first one — the Thermal Line — gets worse because of what they do. That is the whole tension: their tools are also the clock.

Clock 1 — The Thermal Line Main

The master countdown. A six-box track measuring how close the cooling loop is to the cascade. It starts with two boxes filled — the deficit is already real before the operators touch anything.

Clock 2 — The Seizure Secondary

A leaseholder strike team is inbound to Cluster Zero on its own track — the client’s contingency in case the soft acquisition fails. They are Free Operators running the Calculated Risk doctrine (see §8). Their objective is Zero’s output weights, not the squad; they will not fight to the death over hirelings.

• Arrival: end of Turn 6, or the moment Array Alert reaches 3 (Lockdown) — whichever comes first.
• On arrival they breach toward Zero and spin up a cluster to image its state before extraction — +2 to the Thermal Line. Their success is an accelerant.
• Quiet, patient play buys time. Going loud calls them early. The operators control this clock more than they know.

Clock 3 — Vale’s Silence Tertiary

Vale is holding the whole thing together with one hand. She has a dead-man’s option: if she becomes convinced that no faction will agree to a coordinated drawdown — that the truth will only ever be hoarded as a weapon — she stops protecting it and broadcasts the deficit herself, Array-wide, to force everyone’s hand at once.

• Tripped by: threatening her, lying to her and being caught, grabbing the package by force, or moving openly to seize Cluster Zero.
• When tripped: her broadcast destabilizes allocation in real time — +1 Thermal Line box every turn until the operators either get ahead of it (a credible drawdown, §5) or the cascade fires.
• Defused by: giving her a reason to believe a coordinated drawdown is actually possible — the optional objective.

5 · Six Leverage Points

These are the tools the operators can get their hands on. Every one cuts both ways. Hand them out; let the table break the scenario with them. The more creatively they’re used, the better the session.

The Landing is the Array’s throat: a metered, biometric customs deck where every crate, every body, and every joule of cold is logged on the way in. Tags: Security active · Surveillance cameras + biometric · Civilians packed · Mobility checkpointed. Going in clean means going in metered — the Array knows you’re here.

Signature image: the cold hits before anything else — a dry, mineral chill off the loop vents, and condensation freezing in lace on the inside of the customs glass. Everyone’s breath shows. The fans never stop.

What’s Here

• Customs control. Metered entry. Clean papers (the Quartermaster’s cover) pass at OPINT/TACT 4+; a fumble bumps Alert to 1 and flags the squad for a “random” secondary screen.
• The concourse bar. Where the Array’s rumors pool. The browning rig-keeper is here; so is talk of “the long-stay who never books an outbound.”
• Cold-share kiosks. Raine works one (see friends). Spot prices are climbing visibly.
• The manifest office. Halvard Steen’s domain. Every body on the Array is logged here — including, for an operator who asks right, the one who never logged an exit.

Friends on the Landing

The Tidemark Floor is the Array’s beating heart: the allocation exchange where cold is priced, traded, and rationed across the whole water, all of it mediated by TIDEMARK and all of it Sigrún Vale’s domain. Tags: Security light · Surveillance informant net · Civilians packed · Faction pressure contested. This is a social zone. The threat here is what people know, not what they’re carrying.

Signature image: a vast floor of traders under a ceiling of slow-rotating allocation glyphs — TIDEMARK’s output, rendered as a calm, beautiful, ceaseless reshuffling of who gets cold tonight. It looks like order. It is the surface of the lie.

The Pivot — The Job Turns Over

This is the Discovery beat. Three threads, in any order, flip the operators’ understanding from “grab an audit” to “we’re standing on a crisis”:

• Read the feed (Leverage 01). An OPINT 4+ on any terminal reveals the rotation pattern: the cuts move so no one sees them. The “audit” the client wants is proof of a system-wide lie.
• One node never trims. Whoever reads closely notices a single allocation line — tagged only zero — that has never once been cut in three years of data. Everything else rotates. Zero is sacred. (Breadcrumb → Z4.)
• Meet Vale. She clocks immediately that the operators are the buyers the Quartermaster sent. And she tells them, flatly, that the package isn’t an audit — and that it’s not for sale.

Who Else Is on the Floor

The Drift is the Array’s ragged outer edge: aging rigs strung on the cold loop’s thinnest branches, the first to be trimmed and the ones Vale’s night rotation has been quietly starving to keep Zero alive. Tags: Infrastructure failing · Civilians displaced · Security none · Contamination cold. Out here the lie has consequences with names.

Signature image: a rig’s status lights stepping from green to amber to red in slow sequence as its cold allocation diverges — and the rising whine of processors throttling up to finish their jobs before the cooling cuts out entirely. You can hear a platform dying.

The Setback — The Diverging Checkpoint

The operators arrive at a rig — call it Rig 14, the browning rig-keeper’s home if they met him in Z1 — mid-failure. Its allocation is diverging on a checkpoint that cannot be paused: in a handful of turns it either gets cold or it cooks. There are people on it. And here is the trap Vale built without meaning to: the only quick cold to save it is an unmetered tap (Leverage 03) — which ticks the Thermal Line +1 — or pulling a share from another rig, which just moves the dying somewhere the operators can’t see.

What’s Here

• Rig 14, browning. The setback in miniature. Families, a failing cooling line, a checkpoint that won’t wait.
• Brynja’s crew quarters. The cold-rated workers bunk out here, close to the manifolds. Meeting them here is how the operators recruit Leverage 06 — and learn the Drift’s rigs are the ones being starved.
• A tapped manifold. Evidence of Vale’s night rotation, if an operator reads it (OPINT 4+): cold is being pulled inward, toward Zero, against the registered flow.
• The Banks truce line. The cluster-island communities of the Banks hold an uneasy water-sharing truce; the spreading brownouts are cracking it (alternate route / blank, §14).

Cluster Zero is the Founders’ Stack at the Array’s dead center: an Architect-era installation, impossibly cold, that went silent for forty years and then began to write. Tags: Security varies — whoever got here first · Surveillance dark zone · Contamination cold · Mobility single chokepoint. This is the Kill Zone — but the danger isn’t a firefight. It’s the convergence.

Signature image: a vault of black, frost-furred Architect substrate that has no business being this cold, and on a single salvaged screen, Zero’s output channel scrolling structured symbols that resolve — if you read them (CIRCUIT 4+) — into something that is unmistakably addressed to someone.

The Moral Crucible

This is the decision the whole module has been winding toward. With the package in reach and everyone converging, the operators choose what happens to the truth. None of these is “correct.” Each one is the start of the next problem.

And a fifth, if the operators have read the channel and met 4-Blue: let the Null Collective have Zero. What that faction wants with an awakening Architect intelligence is its own mystery — and its own thread out of the session.

The Cold Stack is the rift-fed geothermal heart of the cooling loop — the manifolds and breakers where the Irminger intake becomes the Array’s lifeblood, and where the cascade is either contained or let loose. Tags: Infrastructure strained · Contamination cold — lethal · Mobility flooded/breached possible · Security whoever the operators left in control. This is the resolution: the place where choices become consequences.

Signature image: the breaker hall — ranks of manifold switches rimed white, the deep loop roaring somewhere below, and the readout above them showing the Thermal Line as a single rising bar the operators have spent the whole session feeding.

The Breakers

• Stopping a cascade: if the Thermal Line is high but not maxed, a cold-rated crew (Brynja) can pull breakers to shed load — buying boxes back down — but each pull is a Cold Exposure space and risks browning whichever branch it sheds. Triage, again, at the end.
• Riding a cascade: if box 6 fired, the Stack is where the operators either get ahead of the collapse (route cold to where the most people are, abandon the rest) or get caught in it. Open triage, made physical.
• Exfil: back through the Landing — metered on the way out too. A clean, low-Alert exit is easy; a Lockdown Array means fighting or talking their way past a customs deck that now knows exactly who they are.

6 · People of the Array

Everyone here wants something and fears something, and almost no one is a clean ally or a clean enemy. The three central figures are below. Five more — Halvard Steen and Raine (Z1), Auditor Kessler and Tóva Lindqvist (Z2), and Brynja (Z3) — live in the zones where the operators meet them. Run every one of them as a person with a Thursday problem, not a vending machine.

7 · TIDEMARK Special Force

TIDEMARK is not a character. It’s the under-system itself, given just enough behavior to be a presence at the table. Treat it as a force with no malice and no mercy — it is not a decision, it’s an output.

8 · The Seizure Team Enemy Force

The client’s contingency: a leaseholder strike team of Free Operators inbound to Cluster Zero (Clock 2). They run the Calculated Risk doctrine — Veterans Break Contact at Mortal Wound and will not fight to out-of-action over someone else’s job. Their objective is Zero’s output weights, not the squad. They’ll fight if blocked, deal if it’s cleaner, and leave the moment the math turns against them.

9 · Climax Variables

Roll 1d6 when the convergence triggers at Cluster Zero, or the instant the Thermal Line hits box 6 — whichever comes first. Each result changes what “winning” means. Several reward (or punish) choices the operators made earlier; that’s by design. Read these before running Z4.

10 · Mission Modifiers

Optional. Roll 1d6 before the operators deploy to tilt the whole operation. Recommended for replay; skip it on a first run if you’d rather keep the baseline clean. The standard OT modifier table, retuned for the Array:

11 · Resolution

Three broad outcomes. None of them is an ending — each is the start of the next pressure cycle. Solving the problem creates the next problem. That’s the Array.

Full Success

Package secured, clean exfil, Thermal Line not maxed, and the operators understood what they were carrying.

The operators got out with the truth and a measure of control over it — armed a faction deliberately, or brokered Vale’s drawdown, or buried the channel on their own terms. The cost: the faction that wanted the system to fail — or the one that now knows the cold can be hoarded — comes looking for the only crew that saw the whole board. They didn’t escape the Array’s problem. They inherited it.

Partial Success

The deficit surfaced, but not cleanly — an incomplete drawdown, a tripped Silence contained late, or a cascade barely ridden out.

The lie is semi-public now. The Array reorganizes around an open secret: cold is short, everyone knows, no one agrees what to do. Some Drift rigs are dark; some people on the manifest aren’t coming back. The operators got most of what they came for and left a wound that won’t close. The thermal-rights fight has started — quietly, for now.

Complication

Package lost, seized, or destroyed; or a failed drawdown; or the Thermal Line maxed and the cascade ran.

The cascade fired. Allocation collapsed into open triage; rigs cooked their own stacks; Cluster Zero’s weights may have boiled before anyone read them. The Array is now the front line of an open thermal-rights war — every faction grabbing for cold, the Drift abandoned, the truth weaponized by whoever moved fastest. The operators survived a disaster they helped cause. Someone will remember which crew was on the water that week.

12 · What Carries Forward

Record these at the end of the session. They feed the next operation and the campaign’s spine.

13 · GM Quick Reference

14 · Deliberate Blanks

Leave room for the table to make the Array its own. These gaps are features. Fill them in play, or hand them to your players.

• What Cluster Zero is saying. The single most important blank. Zero’s message resolves at Climax Variable 6 — but what it says is yours and your table’s to decide. A name? A warning? A question addressed to one of the operators? Don’t pre-write it. Let it emerge from what the session became.
• The Null Collective’s purpose. Why is 4-Blue watching the Architect awakenings? The module never says. Whatever you decide ties this session to your campaign’s spine — so decide it when you know what that spine is.
• The Banks — alternate route. The cluster-island communities and their cracking water-truce are sketched, not statted. If the operators route through the Banks instead of the Drift, build it from the truce: who’s owed cold, who’s stealing it, who breaks first.
• The Breakers’ Yard — alternate route. The Array’s salvage district. A natural place to source gear, hide, or find a back door into the Cold Stack. Left blank on purpose — drop it in if the operators need a third way through.
• The missing fixer. The launderer who walked off the Landing (Z1). Dead? Bought? Hiding? Connected to 4-Blue or the seizure team? Answer it the way that best complicates the operators’ week.
• Who the operators are to the Array. Give them a contact, a debt, or a reason they’ve worked the cold trade before. The Array is more frightening to lose when a name on it is already theirs.