More Hideous Randomness

Building on fond memories of other random generators, what might a random Trail of Cthulhu adventure generator look like? The tables below generate a highly random Trail mystery. As with all random generators, the goal is to prompt the Keeper’s creativity in connecting disparate elements – don’t expect coherence from random rolls alone!

Adventure Hook (d12)

Why do the investigators get involved? (You can also use this as a way to determine the theme or atmosphere of the adventure if you’re not using pregenerated characters.)

  1. Adventure
  2. Arrogance
  3. Antiquarianism
  4. Artistic Sensitivity
  5. Bad Luck
  6. Curiosity
  7. Duty
  8. In the Blood
  9. Revenge
  10. Scholarship
  11. Sudden Shock
  12. Thirst For Knowledge

(The drives Ennui and Follower aren’t used in the list above.)

Location (d20)

Where does the adventure take place? The somewhat eclectic list of suggestions below is based on the locations discussed in the Trail of Cthulhu rulebook.)

  1. United States – Rural
  2. United States – Small Town
  3. United States – Urban
  4. United States – Lovecraft Country
  5. Abyssinia/ Belgian Congo
  6. Antarctica
  7. Brazil
  8. Burma
  9. Egypt
  10. Germany
  11. Greenland
  12. Haiti
  13. Mongolia
  14. Peru
  15. Rumania
  16. Saudi Arabia
  17. Soviet Union
  18. Easter Island/South Pacific Mandate
  19. Spain
  20. Thibet

Apparent Situation (roll 1d20)

What are the investigators doing here?

  1. Commercial interest – it’s related to the business of an investigator, like a real estate deal
  2. Investigate disappearance – of a friend, relative or other acquaintance. Or a strange, if the investigator is a police officer, detective or other specialist.
  3. Investigate untimely death – as above.
  4. Investigate cryptic events – lights in the sky, strange footprints, sinister letters.
  5. Investigate criminal activity – bootlegging, extortion, theft
  6. Investigate alleged supernatural event – ghosts, seances, vampire attacks, curses.
  7. Investigate medical mystery – strange disease, sudden madness
  8. Investigate prodigy – fallen meteorite, brilliant scientific discovery
  9. Carry out personal errand – execute a will, return a book borrowed years before
  10. Carry out mundane task – something connected to the investigator’s occupation
  11. Carry out official duties – as above, but a little more formal and significant
  12. Survey site – examine a location in detail, for commercial or archaeological reasons
  13. Report on story of interest – even if the investigator isn’t a reporter, they might be asked to look into a local mystery
  14. Research local history – as a hobby, out of antiquarian interest.
  15. Visit distant cousins or aged relative – haven’t seen them in years, I wonder what they’re up to
  16. Visit old friend or correspondent – as per Henry Akeley in Whisperer in Darkness
  17. Vacation or (recuperation after traumatic experience) – just what you need after that last nightmarish encounter
  18. Vehicle breakdown or travel delay – you’re stuck here for a while
  19. Drawn here by strange dreams – because you’re a Lovecraftian protagonist
  20. Seeking mysterious object or book – that has recently come to light

Horrible Truth (roll 1d12)

What’s really going on?

  1. The Apparent Situation is the true situation
  2. There’s a CULT here, and their activities may be exposed by the Apparent Situation
  3. There once was a CULT here; it’s mostly moribund, but some horror connected to the cult lies buried here and may be exposed by the Apparent Situation
  4. There’s an active and ambitious CULT here; the Apparent Situation is connected to some malign intent of theirs.
  5. There’s a CREATURE here, disinterested in humanity unless provoked.
  6. There’s a CREATURE here, preying on humanity.
  7. There’s a CREATURE here, slumbering – but it may be awoken by the Apparent Situation.
  8. The Apparent Situation was triggered by a TOME OR ARTEFACT
  9. Someone’s using the Mythos for personal gain using a TOME OR ARTEFACT
  10. There’s a GOD OR TITAN slumbering here, and its presence disturbs the world
  11. There’s an ancient ruin or tomb connected to a GOD OR TITAN here, guarded by a (1-3: CULT, 4-6: CREATURE)
  12. There’s a clash between two entities (roll 1d6 for each: 1-3: CULT, 4-5 CREATURE, 6 GOD OR TITAN).

Cult

Roll on the the Cult Size, Cult Status, Cult Intent and Blasphemous Rites tables.

Cult Size (roll d6)

  1. A single sorcerer
  2. A small cabal (a single family, a few locals)
  3. A congregation (two dozen or so)
  4. Endemic in the area (lots of people in the area are involved)
  5. Far-flung (only a small cabal here, but the cult is spread across the world)
  6. Great conspiracy (cult is world-wide and exceedingly well connected)

Cult Status (roll 1d6)

  1. Dead – no cultists left, only their works
  2. In decline – only a few left
  3. Secret – cult is hidden and mostly inactive, only performing rites on rare occasions
  4. Active – cult continues its sinister practices
  5. Recruiting – cult seeks new members
  6. On the verge of triumph! – cult is about to take a major step towards its goal

Cult Intent (roll 1d6)

  1. Worship of CREATURE with offerings, sacrifice
  2. Worship of GOD OR TITAN
  3. Study of TOME OR ARTEFACT
  4. Acquisition of power
  5. Keepers of CREATURE
  6. Summon GOD OR TITAN, end reign of humanity.

 Blasphemous Rites Include (roll 1d10)

  1. Worship outdoors at ritual site
  2. Worship at hidden temple, cave or ruin
  3. Bizarre surgical experiments
  4. Congress with CREATURE
  5. Use of drugs or extracts
  6. Ritual initiation
  7. Travel through dreams or magical gateways
  8. Use of ritual magic
  9. Ritual sacrifice
  10. Transformation

Creature (roll 1d100)

1-2 Bat-Thing
3-4 Bhole
5-6 Black Winged Ones
7-8 Byakhee
9-10 Colour Out of Space
11-15 Dark Young of Shub-Niggurath
16-20 Deep One
21-22 Dimensional Shambler
23-24 Elder Thing
25-26 Flying Polyp
27-28 Elder Thing
29-30 Formless Spawn
31-32 Gaseous Wraiths
33-38 Ghoul
39-40 Gnoph-Keh
41-42 Great Race of Yith
43-44 Hound of Tindalos
45-46 Hunting Horror
47-48 K’n-Yani
49-50 Lemurian
51-52 Lloigor
53-54 Masqut
55-56 Medusa
57-60 Mi-go
61-62 Moon-beast
63-64 Nightgaunt
64-66 Raktajihva
67-68 Rat-Thing
69-70 Sand-Dweller
71-72 Serpent Folk
73-74 Servitor of the Outer Gods
75-76 Shan
77-78 Shantak
79-80 Shoggoth
81-82 Son of Yog-Sothoth
83-84 Space-Eater
85-86 Star Vampire
87-88 Ultraviolet Devourer
89-90 Tcho-Tcho
91-92 Vampirish Vapour
93-94 Wendigo
95-96 Worm-Cultist
97-98 Xothian
99-100 Y’m-bhi

Gods & Titans (roll 1d20)

  1. Azathoth
  2. Chaugnar Faugn
  3. Cthugha
  4. Cthulhu
  5. Dagon
  6. Daoloth
  7. Ghatanothoa
  8. Gol-Goroth
  9. Hastur
  10. Ithaqua
  11. Mordiggan
  12. Mormo
  13. Nodens
  14. Nyarlathotep
  15. Quachil Uttaus
  16. Shub-Niggurath
  17. Tsathoggua
  18. Y’golonac
  19. Yig
  20. Yog-Sothoth

Tomes & Artefacts (roll 1d20)

1. Necronomicon, original
2. Necronomicon, modern
3. Cultes des Goules
4. De Vermis Mysteriis
5. King in Yellow
6. Book of Eibon
7. Pnakotic Manuscripts
8-9 Idol of GOD or TITAN
10-11 Idol of CREATURE
12-13 Relic or Mummy of CREATURE
14. Remains of ancient sorcerer or priest
15. Ancient Stone
16. Dust or Elixir
17. Cryptic Machine
18. Weapon or Tool
19. Enchanted Place
20. Gateway or portal

Structuring the Adventure

As a starting point, assume 3-5 core clues must be discovered and 1-3 hazards must be overcome to complete the investigation.

Random Core Clues

Clue Type

1-2 Academic
3-4 Interpersonal
5-6 Technical

Academic

  1. Accounting
  2. Anthropology
  3. Archaeology
  4. Architecture
  5. Art History
  6. Biology
  7. Cthulhu Mythos
  8. Cryptography
  9. Geology
  10. History
  11. Languages
  12. Law
  13. Library Use
  14. Medicine
  15. Occult
  16. Physics
  17. Theology
  18. Roll again, but it’s an impossibility
  19. Roll again, but it’s a personal connection
  20. Roll again, but it’s a terrible revelation

An Impossibility: This rock is older than the universe! This painting is moving! This library is carnivorous!

A Personal Connection: Your Medicine can’t tell you anything about this condition – but you do know a retired physician, Doctor Black, who lives nearby. Maybe he can help.

A Terrible Revelation: Oops! I just correlated hitherto disassociated fragments of knowledge. Rookie mistake.

Interpersonal

  1. Assess Honesty
  2. Bargain
  3. Bureaucracy
  4. Cop Talk
  5. Credit Rating
  6. Flattery
  7. Interrogation
  8. Intimidation
  9. Oral History
  10. Reassurance
  11. Streetwise
  12. Roll again, but it attracts the attention of sinister forces

Sinister forces: It’s not wise to ask questions about certain topics.

Technical

  1. Art
  2. Astronomy
  3. Chemistry
  4. Craft
  5. Evidence Collection
  6. Forensics
  7. Locksmith
  8. Outdoorsman
  9. Pharmacy
  10. Photography
  11. Roll again, but it’s an impossibility
  12. Roll again, but it exposes the investigator to something toxic or hazardous

Exposure: You see a strange light as you look through the telescope; you pick the lock, but discover the door’s a twist in space and time…

Random Hazards

  1. Athletics – a chase scene, a physical obstacle
  2. Conceal – a hidden trap
  3. Disguise – you must infiltrate a group
  4. Driving – dangerous conditions or a car chase
  5. Electrical Repair/Mechanical Repair – a piece of equipment is vitally needed
  6. Explosives – it’s the only way to be sure
  7. Filch – you must steal something
  8. Firearms – a combat scene at range!
  9. First Aid – someone’s dying or badly injured
  10. Health – exposed to a toxin
  11. Piloting – we’re on a boat
  12. Riding – we’re on a horse
  13. Stability – keep it together, man!
  14. Scuffling – a combat scene, up close!
  15. Sense Trouble – there’s something out there.
  16. Shadowing – quick, after them!
  17. Stealth – you must infiltrate a place
  18. Weapons – a combat scene, with sharp bits
  19. Roll again twice
  20. It’s a combat scene, with a complication. Roll again for the second ability involved, other than a combat ability. For example, Riding implies a shoot-out on horseback; Stealth implies an assassination attempt.

Putting It All Together

Let’s roll up a random adventure and see what comes of it!

Our initial hook is SCHOLARSHIP, and our location is ANTARCTICA. Clearly, we’re on a scientific expedition – maybe the Starkweather-Moore expedition promised at the end of At The Mountains of Madness. It’s hardly worth rolling an Apparent Situation in this case. The Horrible Truth is that there’s a CREATURE preying on people – specifically, a BLACK WINGED ONE, the assassins of the Cthulhu cult.

Our key clues are: BUREAUCRACY, ART and OUTDOORSMAN, and our random hazards are FILCH and RIDING.

So… the expedition to the Antarctic includes a secret worshipper of Cthulhu. He summons up a Black Winged One to kill other members of the expedition, for he seeks to get to the glacier where Cthulhu slumbers. Bureaucracy reveals that someone infiltrated the expedition under an assumed name, Art (plus Filch) means the investigators steal the cultist’s sketchbook and see his crazed scribblings of a buried god, and Outdoorsman & Riding imply a desperate sleigh-dog chase scene across the frozen wastes!

Another random attempt yields:

ARROGANCE for our hook, SPAIN for our location, VACATION for our Apparent Situation. That sounds like a bunch of idealists charging off to volunteer in the Spanish civil war. The horrible truth is that there’s a clash between two Cults.

The first Cult is a lone sorcerer who’s on the verge of triumph – he seeks to acquire power, and his blasphemous rites include Ritual Initiation.

He’s opposed by a second cult that Endemic in the Area, highly Secret, and worships… hmm. The Tcho-Tcho. Their rites include congress with a creature – rather an involving a second race, let’s assume it’s congress with Tcho-Tcho. Presumably, there’s a connection between the Plateau of Leng and the Meseta Central.

Obviously, if it’s the Spanish civil war, then the two cults are on opposite sides. A Communist sorcerer? Fascist Tcho-tchos? Or the other way around?

Our core clues are INTIMIDATION (Interrogating a prisoner, maybe?), OCCULT and COP TALK; hazards are Piloting and Sense Trouble.

So – the investigators are volunteers on the Republican side. Interrogating a prisoner, they learn of a fascist plot to bomb mountain villages. (Time to do some research on aerial bombardment and air power during the Spanish civil war; Guernica can be a touchstone here). OCCULT discovers the villages are being targeted because of their connection to the Tcho-Tcho cult; the investigators need to use Piloting and a borrowed biplane to shoot one bomber down before it commits the mass sacrifice needed a portal to Leng and the triumph of the Nazi sorcerer behind the bombing plan. Cop Talk and Sense Trouble warn the investigators that their Tcho-Tcho-worshipping allies will turn on them after the fighting’s done, and they should head back to the safely of the lowlands if they hope to survive…


Trail of Cthulhu is an award-winning 1930s horror roleplaying game by Kenneth Hite, produced under license from Chaosium. Whether you’re playing in two-fisted Pulp mode or sanity-shredding Purist mode, its GUMSHOE system enables taut, thrilling investigative adventures where the challenge is in interpreting clues, not finding them. Purchase Trail of Cthulhu, and its many supplements and adventures, in print and PDF at the Pelgrane Shop.

4 Responses to “More Hideous Randomness”

  1. Walts says:

    What a great help this would be for any budding writers to build a whole scenrio upon! … Luv it!!! … Walts

  2. Niclas Matikainen says:

    Oh my… That’s some good stuff there! Really nice :)

  3. Jeffrey Moran says:

    Regarding locations, after looking up and reading about them in the Trail of Cthulhu rulebook (p.175, “The Nightmare Countries”), I’d like to see more articles that elaborate on additional places. This section of the rulebook was a great read but too short.

  4. […] just published a cool set of tables on the News page of their website that they’re calling “More Hideous Randomness.”  Keepers can use the tables to generate a Mythos mystery for the  investigators to explore. […]

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