Mothership is a sci-fi horror RPG. Think Alien, The Thing, Pitch Black, or Annihilation. The core boxed set of the game comes with two amazing resources.

First, Unconfirmed Contact Reports, which is Mothership’s equivalent of a Monster Manual. It includes a fair share of ghouls and greys and husks, but also even more terrifying threats like The Good and Granny and Sally in the Screen.

Second, the Shipbreaker’s Toolkit, which notably includes a dozen ships with full specs, illustration, and maps, like the Sato GS Grail VI executive transport:

I love this kind of raw adventure fodder. Stuff that’s prepped and packaged so that you can just drop it straight into session and take off running. You need to put in zero work, because everything you need is already on the page. You can just use it. And often not just once, but over and over and over again.

You’d think this sort of stuff would be the rule rather than exception in RPGs, but this is surprisingly not the case. You’re far more likely to get a bunch of “adventure ideas” that you need to flesh out. Or you’ll get something like a ship described in broad terms, but without the concrete tools you need to bring it to the table with rock solid confidence.

Because Mothership gives you these great resources, though, we have an opportunity to leverage them to even greater heights.

DERELICT ADVENTURE RECIPE

Scenario Hook: The PCs find a derelict spacecraft floating in space. Or they answer a distress beacon. Or they’re sent as a salvage crew.

Step 1 – Ship: Pick a random ship from the Shipbreaker’s Toolkit or roll on this table.

Step 2 – Monster: Pick a random monster from Unconfirmed Contact Reports. This monster is onboard the derelict (and is almost certainly why it’s a derelict).

Note: Not every creature in Unconfirmed Contact Reports is equally likely to work well with this adventure recipe, so I’m not including a random table here. (If you want to roll randomly, you can flip to a random page or roll a random number on the book’s Index.) Don’t forget the Five Quick Horrors on the back cover of the book!

Step 3 – Monster Sign:

• Pick three ship compartments. Place a hint suggesting the horror that was unleashed here in each compartment.
• Pick three more compartments. Place a clue revealing the monster’s identity and/or abilities in each compartment.
• If the monster has a special weakness, add three clues that reveal this weakness anywhere in the ship. (One of these clues may be found while encountering the creature itself.)

Step 4 – Confrontation: Either…

• Pick a compartment where he monster is currently located.
• Roll 1d6 each time the PCs enter a compartment. On a roll of 1, the monster finds them and attacks.

Or both.

And that’s the whole recipe. As you can see, you can probably spin up the whole adventure in less than fifteen minutes. (I’d say you could it while the players are rolling up their characters, but that’s probably not true only because character creation in Mothership is so insanely fast.)

LARGER SHIPS

Some of the ships described in the Shipbreaker’s Toolkit, like the Northstar Paragon exploration vessel, are very large. Using the basic recipe on these ships will result in adventure content being spread out too thinly across the numerous rooms.

Option 1: Increase the number of hints and clues. For example, you might use the guidelines above for every deck of the ship instead

Option 2: Run the ships as a sector crawl, reading “sector” in the recipe everywhere that it says “compartment.” (Conveniently, the ships in the Shipbreaker’s Toolkit are already mapped in sectors.)

RANDOM DERELICT SHIPS

The adventure Dead Planet, which can be found in the deluxe edition of Mothership or purchased separately, includes a Random Derelict Ship Generator, including stuff like random cargo and, even more importantly, a random deckplan generator.

How incredibly useful!

Instead of selecting a ship from the Shipbreaker’s Toolkit, you can obviously use the Random Derelict Ship Generator to provide an endless variety of ships for this adventure recipe!

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Go to Part 1

What makes a mystery scenario work is, ultimately, the structural revelations: The PCs need to find a lead that will take them to the SS Brittany and they need to find the clues that reveal how to defeat the ento-parasites from Planet X.

Using the Three Clue Rule, node-based design, and similar scenario-building tools, therefore, we make these structural revelations robust and distribute them throughout the mystery in interesting and effective ways. Ideally, the result is a mystery scenario that’s more likely to succeed than to fail, and is also compelling for the players from beginning to end.

But not every possible revelation in a mystery scenario is load-bearing.

For example, while investigating strange murders in the Welsh countryside, it might be really cool for the PCs to discover that the coven of witches responsible for the killings is descended from a cult of Isis worshipers who escaped from Egypt during the final days of the Ptolemeic Pharaohs. And it’s probably even cooler if they realize the goal of the multi-generational ritual killings is to bring Cleopatra herself back from the dead!

Such revelations might even feel essential for the players to fully appreciate the scenario. Strictly speaking, however, these background revelations aren’t required. The PCs can follow their leads and find the subterranean passages which serve as the coven’s base of operations, and even puzzle over the Egyptian-style murals painted on the walls there, without ever truly realizing the coven’s long history. They might even fight (and defeat!) the lich-pharaoh without ever realizing that she’s Cleopatra!

Understanding and being able to recognize the difference between structural revelations (the PCs must know where the coven’s HQ is to finish the scenario!) and background revelations (it would be really cool if they knew who the lich-pharaoh was!) offers a lot of practical advantages when it comes to both designing and running mystery scenarios.

First, I recommend keeping your background revelations on a completely separate revelation list from your structural revelations.

Having a revelation list for background revelations is useful for design: Since you do, in fact, want the PCs to learn that the lich-pharaoh is Cleopatra, you’ll want to use the Three Clue Rule and make sure the clues pointing to that revelation are positioned for maximum effect.

On the other hand, since these background revelations are nonessential structurally-speaking, you don’t actually need to track them during play: If something goes wrong, it only means that the identity of the lich-pharaoh becomes a source of enigma. That may or may not be ideal, but it’s a perfectly cromulent outcome.

Note: As discussed in the article on Enigma, the fact these background revelations are structurally nonessential may also mean that you don’t care about them being robust, either! You can use the Three Clue Rule to make background revelations robust, but technically the rule only applies to structural revelations.

Conversely, by removing these nonessential revelations from your main revelation list, you effectively declutter your list of structural revelations: These are the revelations you DO need to keep track of during play so that you can troubleshoot them if something goes wrong, and getting rid of the clutter will make that mid-session tracking much easier to do!

THE PURPOSE OF A BACKGROUND REVELATION

If background revelations aren’t required for the success of a scenario, though, why include them at all? Wouldn’t it simplify everything and declutter the entire experience if you got rid of them entirely?

The short answer is that man does not live on bread alone.

Structural revelations may be how the PCs navigate their way to the scenario’s conclusion, but it’s background revelations that give the scenario meaning. Background revelations are also how you “show, not tell” when it comes to historical research and worldbuilding.

This isn’t just about delivering memorable “oh wow, that’s cool!” moments for the players rather than generic lich fights that will be forgotten before the next session (although it is that, too!).

Plus, from a purely practical standpoint, you often WANT a little clutter in your mystery scenarios: Remember that when the players first discover a strange clue, they’re likely going to be trying to figure out how it fits into the overall pattern of clues (and other strange things) they’ve discovered so far. The clues and details associated with background revelations help to fill up your scenes with cool stuff that can be uncovered via investigation.

Along these same lines, background revelations can also be very good at delivering small victories even while the big questions remain elusive to them: They may not know where the cult is located, but figuring out that they’re Isis worshipers feels like a win! Wins like that are what will keep the group motivated and moving forward in their investigation.

In other words, just because they’re structurally nonessential, it doesn’t mean that background revelations are meaningless. To the contrary: They’re packed full of meaning! Their entire existence is to provide meaning!

DISCUSSING
In the Shadow of the Spire – Session 39B: Shivvel, Slaves, and Gold

“If they’re running a major drug operation here, this isn’t nearly enough money.”

It was clear, too, that there had once been much more of the shivvel stored here. Tee suspected that the destruction of Linech Cran’s operation was continuing to affect the ratlings’ supply.

Poking around the rest of the room she discovered that a section of the wall could be removed, revealing a detailed map of the Warrens with several locations marked with crude symbols.

When discussing node-based design, a lot of focus tends to be put on how it can be used for scenarios like the 5-node mystery. Which makes sense. It’s a very versatile scenario structure, easy to use and adaptable to a lot of different situations.

But I first came to node-based design as a campaign structure, as described in Node-Based Campaigns: Not linking together scenes in an adventure, but as a way of linking one adventure to another. In the Shadow of the Spire, a campaign I was actually running and designing when I wrote Node-Based Scenario Design, is almost entirely built using a node-based campaign structure.

You can see a pretty focused example of what that looks like in the current adventure.

I labeled each adventure with an alphanumeric code. So the PCs are currently in CC01 Temple of the Rat God. The “CC” stands for “Chaos Cults.” Act II of the campaign also includes BW and NOD adventures, for Banewarrens and Night of Dissolution, respectively. The distinction of “BW” adventures reflects that Act II of the campaign is built around two separate forks (the chaos cults and the Banewarrens), while having “NOD” and “CC” designators started as a convenient way of distinguishing “stuff from the Night of Dissolution campaign book” from the wide variety of additional chaos cult scenarios I was adding to the campaign.

But why have alphanumeric codes at all?

Mostly convenience and clarity.

For example, it made it easy to say that the Marked Map of the Warrens handout (as seen below) was pointing to CC01A Warren Shivel Dens.

Why “CC01A” instead of “CC02” or some other distinct number? Again, it mostly boils down to what I found most useful. I generally found it useful to group together scenarios that were more closely related to each other. For example, the adventures found in Ptolus Remix: The Mrathrach Agenda were originally NOD5 Mrathrach Machine and NOD5A The White House.

The warren shivvel dens directly operated by the ratling cultists were more closely/directly related to CC01 Temple of the Rat God than they were to, for example, CC07 Porphyry House of Horrors. In this case, I’d also “discovered” the warren shivvel dens existed while prepping CC01 Temple of the Rat God, so it just made sense to me to insert them into the numbering sequence here.

Other clues the PCs found here include:

• Sewer Routes to the Coast, a map which is an alternate clue to CC01A and also to 004A Slaver’s Enclave (an adventure from Act I).
• Questioning the slaves, which would also lead to 004A Slaver’s Enclave.
• Sewer Tunnels to Oldtown, a map leading to NOD4 Temple of Deep Chaos.
• Broken square symbols forming a trail in the sewer tunnels, which could be followed to CC02 Temple of the Ebon Hand.

And here you can directly see the dynamics of a node-based campaign in play. Having found all these clues, the PCs have to make a decision about which lead they’re going to pursue next. (And, in this case, that actually includes, “Do we keep exploring the dungeon we’re in? Or do we switch gears?”) The players are immediately drawn into this discussion (at least in part because they’re collectively puzzling out what the clues mean and how they’re connected to things they’ve learned elsewhere in the campaign), causing the group to collectively think deeply about the campaign and get drawn further into the game world.

Also, because of the redundancy of the Inverted Three Clue Rule, it would also have been fine if, for example, they didn’t question the slaves…

…which, from a structural standpoint, they didn’t.

Ranthir, meanwhile, was feeding the malnourished slaves while Tor gently questioned them. It turned out that most of them had been freshly captured off the streets of Ptolus, many from the Warrens. Several were obviously shivvel addicts and easily preyed on. There was an elven prisoner, however, who had a different tale to tell: He had lived in the village of Onsafal in the Teeth of Light. He and most (if not all) of his village were captured by slavers and then sold through the black markets of Freeport. He had arrived at the Docks, been taken to a warehouse, and then sold to the ratlings.

Ranthir heard from one of the slaves how they’d been kidnapped and taken to a warehouse in the Docks, but he never followed up by asking the elf where the warehouse was located. (A classic example of a player not realizing that a clue is actually a clue.)

In fact, as the campaign continues, you’ll discover that the PCs didn’t follow MOST of these clues.

There are a variety of reasons for this. For example, the redundancy between the Sewer Tunnels to Oldtown map and the Marked Map of the Warrens caused them to conflate the two. They chose to approach the shivvel dens above ground, and ended up ignoring the fact that Sewer Tunnels to Oldtown also included a tunnel leading to the Docks (and the warehouse the elf had mentioned).

(It’s particularly fun when something like this happens, they eventually find a different path, and then many moons later they’re reviewing their notes, discover the clue they ignored, and say, “Holy crap! We had the solution the whole time!”)

There are a few other connections to note.

The shivvel they find here is a payoff from previous foreshadowing. Way back in Session 9, the PCs had found a note indicating that Silion was getting shipments of shivvel from Linech Cran. This was an existential lead, as described in Running Mysteries: The Two Types of Leads – it told the PCs that Silion existed, but didn’t give them any way of actually finding her. That foreshadowing set up Silion as an antagonist, and here we complete the circuit.

The Deathmantle cult symbol the PCs find here is the opposite end of the same thing: The PCs learn the Deathmantle cult exists, but have no way of finding them right now.

The evidence that the cultists are having problems sourcing shivvel (which is further developed in CC01A) because the PCs took out Linech Cran’s shivvel operation is another form of payoff, this time showing the impact of the PCs’ actions on the game world.

Along similar lines, in Session 39C the PCs also find a note indicating that the Temple of the Rat God had begun investigating the Arathian Job, giving them a well-earned pat on the back for a job well done, while also making them just slightly paranoid that the cultists were on their trail.

Don’t worry: A little paranoia is good for the players.

Campaign Journal: Session 39C – Running the Campaign: Reputation
In the Shadow of the Spire: Index