Building a 1920s Investigator — Archetypes, Secrets, and Fears

A good 1920s horror investigator is not a bundle of stats. It is a person with one thing they are competent at, one thing they are hiding, and one thing they will not walk toward in the dark. Get those three right and the character can survive contact with anything the Keeper throws at them — including their own player's tendency to freeze at the first locked door. Get them wrong and you have a professor who is good at nothing in particular, worried about nothing in particular, and useful to no one at the table.

This is a working guide to building that character — the six archetypes that carry most 1920s horror games, the cultural fabric of the decade, and the three-line template (occupation, secret, fear) that turns a name on a sheet into someone the Keeper can build around. Example cards at the end.

The three lines that do the work

Every playable 1920s investigator can be summarised in three sentences, and if the three sentences are strong the sheet almost fills itself in.

Occupation is what the character does for a living, specifically enough that it opens doors. "Professor" is not an occupation; "adjunct lecturer in Semitic Languages at a small New England college" is. The specificity matters because the Keeper needs a reason to give this character the clue when it appears — a name in Aramaic, a symbol carved in a doorframe, a colleague who suddenly stopped publishing. A vague job description forces the Keeper to invent a reason every session. A precise one already justifies half the plot hooks in the campaign.

Secret is one thing the character has done, or knows, that they have not told anyone. It does not have to be dramatic. It has to be theirs. A journalist who burned a notebook after a source begged them to has a secret that will bleed into every scene where they meet a new source. A doctor who signed a death certificate they weren't quite certain about has a secret that will get louder every time they walk into a morgue. The best secrets are things the character could still fix and hasn't, because that keeps them alive as story material rather than dying as backstory.

Fear is the thing the character will not walk toward, even when the plot needs them to. Keep it specific and sensory — the smell of dark-room chemicals, a particular typewriter, the color of the sky just before dawn — rather than a category ("the dark," "spiders"). Specific fears give the Keeper a lever to pull without warning; general fears go invisible after the first session. A fear the character cannot quite explain beats a fear with a tidy origin story.

Those three lines are what the 1920s character generator produces on a single card. Roll one for yourself, or roll a handful and pick the one that catches. The point of the tool is not to replace the writing — it is to give you a first draft you can talk back to.

Six archetypes that carry the era

1920s horror games converge on a small set of professional archetypes for the same reason interwar detective fiction did: these were the jobs that had access to strange information without institutional oversight. A university, a newsroom, and a doctor's practice were all places where one person could quietly pursue a lead the establishment would rather leave alone. Six archetypes carry most tables.

The professor is the archetype most associated with the genre and the one most often written flat. What makes a professor playable is a specific field narrow enough to justify obscure expertise but broad enough to generate hooks — comparative anthropology, Semitic languages, folklore studies, medieval heresies. Add an institutional wound: denied tenure, on annual contract, recently returned from a leave they will not discuss. The professor's real job at the table is to know one strange thing per session nobody else could reasonably know.

The journalist is the archetype that gets the party through doors. A staff reporter at a mid-sized daily can call anyone in the city and reasonably expect a callback. A stringer for the wire services has an excuse to be in a small town for a week. The occupational hook worth pushing is that a journalist has an editor, and an editor wants copy — which means the journalist is under pressure to write about what they see, and their secret is often something they saw and did not file.

The dilettante supplies money and time — heirs, trust-funded amateurs, society hostesses, widowed collectors. The trap is playing them as either useless or omnipotent; the correction is that their competence is narrow. A yachtsman knows boats, tide charts, and five harbourmasters. A society hostess knows who is sleeping with whom and can get you into a party. Wealth pays the bills; specific competence solves the scene.

The detective is the archetype most likely to have a gun and least likely to survive using it. Private investigator, former Pinkerton, insurance-fraud specialist, ex-Boston-police. The reason to play a detective is not the combat statistics — 1920s horror is unkind to gunfights — it is the professional habit of looking at scenes methodically and noticing what does not fit. A detective's secret is almost always a closed case, filed with a report that was not quite true.

The antiquarian is the professor's cousin from the private sector. Rare-book dealers, private-museum curators, estate appraisers, restorers of manuscripts. The antiquarian has the professor's knowledge without the institutional cover, which makes them free to pursue things a department would forbid — and exposed when things go wrong. The occupational hook is that antiquarians hold objects, and objects in this genre are rarely inert. Their secret is often a purchase they made, or one they turned down and cannot stop thinking about.

The medic walks toward the body — general practitioners, alienists at private sanatoriums, coroners' assistants, nurses trained in France during the war. The medic has professional access to the dead, the dying, and the categorised-insane, and the professional habit of not looking away. It's a heavy archetype to play; the best medic characters carry a specific case from their past around like a stone.

The decade the game is actually set in

Playing a 1920s investigator well means knowing what that decade felt like to live in, not just what it looked like in a photograph. Four forces shaped nearly every American character in the period, and any of them can carry a whole session.

Prohibition ran from 1920 to 1933 in the United States. It did not stop anyone drinking, but it did make every drink either a small crime or a favour owed to someone. Your investigator knows a speakeasy, or is embarrassed that they know one, or is a dry activist who is furious that everyone else knows one. The bootlegger networks that grew up around Prohibition were the first modern organised-crime infrastructure in the country, and any urban character brushes against them whether they want to or not. Rural characters brush against moonshine and revenue agents. Nobody in the decade has a neutral relationship with alcohol.

The spiritualist boom ran through the same years and had the same energy — a mass movement operating in the space the mainstream would not admit existed. Séances, spirit photography, ectoplasm, and the celebrity mediums who fronted them were everywhere in the popular press. Arthur Conan Doyle was giving lectures on fairies; Harry Houdini was touring the country debunking mediums. A 1920s investigator has an opinion on this material, and the opinion says something about them. The credulous character walks toward things the skeptic will not. The skeptic is more useful in a fight and more likely to miss the real threat.

Post-war trauma is the invisible pressure under most adult characters. The Great War ended in 1918. Every man over about twenty-five either served or has a reason he did not, and the ones who served came home to a country with no language for what they had seen. The 1918 flu pandemic killed more Americans than the war and left a second layer of grief. PTSD did not exist as a diagnosis; "shell shock" was the closest word. A character who carries this quietly is more interesting than one who wears it as a costume.

Technological anxiety rounds it out. The 1920s were the decade radio arrived in the home, motor cars became common, aeroplanes stopped being a novelty, and the telephone reached ordinary households. Every one of these felt uncanny to somebody. A telephone that rings in an empty house lands harder in 1925 than in 2025.

Naming a 1920s character

Period-accurate first names carry more of the setting than costume descriptions do. The generation coming of age in the 1920s was born between roughly 1885 and 1905, which puts them in a naming pool that runs to Ambrose, Cornelius, Percival, Rutherford, Silas, Horatio, Theodore, Alistair, Reginald, Sebastian, Malcolm, Edmund for the men, and Eleanor, Vivienne, Prudence, Clementine, Winifred, Marguerite, Adelaide, Beatrice, Josephine, Millicent, Harriet, Cordelia, Rosalind, Hazel, Ophelia for the women. Surnames from the same window skew Anglo-Scottish for old New England families — Ashcombe, Bellingham, Carrington, Devereux, Fairfax, Halloran, Kingsley, Merriweather, Sinclair, Thackeray, Whitcombe.

Nicknames cut across class — Ted for Theodore, Reggie for Reginald, Millie for Millicent, Cora for Cordelia — and using one signals informality between characters faster than any description does. For characters meant to sound uncanny rather than period, the Lovecraftian name generator pulls from the mythos naming register (Whateley, Marsh, Curwen, Pickman) and can seed an NPC family in a couple of clicks.

Six example cards

Six investigators, one per archetype, written to the same three-line spec. They are meant as reference points, not pregens — take the shape, not the name.

Ambrose Whitcombe, Professor. Assistant Professor of Comparative Anthropology at a small New England college. Secret: they have quietly copied a page from a manuscript the library insists does not exist. Fear: their own handwriting on pages they do not remember writing.

Eleanor Devereux, Journalist. Investigative reporter on unpaid leave. Secret: she is sitting on a source she promised to protect and is starting to regret it. Fear: telephones that ring after midnight.

Percival Ashcombe, Dilettante. Yachtsman with a private library. Secret: he funded an expedition that returned with two fewer members than it left with. Fear: the ocean in fog.

Vivienne Sinclair, Detective. Private investigator, one small office in Providence. Secret: she closed a case in 1921 with a report that was not quite true. Fear: a knock at the door in a particular rhythm.

Cornelius Merriweather, Antiquarian. Dealer in rare books with a shop on Cornhill. Secret: he sold a volume to a buyer who he later learned was not who they claimed to be. Fear: margin notes in unfamiliar hands.

Adelaide Halloran, Medic. Alienist on staff at a private sanatorium. Secret: she prescribed something in 1922 she still thinks about. Fear: a former patient who writes to her monthly.

Turning a card into a session

The card is a starting position. What makes it playable is the Keeper (or the player, at session zero) picking one thread and running it into the current scenario. A professor whose fear is dry leaves scraping stone belongs in a scenario where somewhere, off-screen, dry leaves are scraping stone — and the moment they do, on-screen, the professor's player already has something to react to. The character-backstory generator is useful here for filling in the wider family and the pre-game life; the card is the pressure points, the backstory is the surface area they push against.

For Keepers building the encounter side of a scenario around these investigators, the TTRPG encounter generator can seed the shape of a location or antagonist without prescribing stats — 1920s horror rewards the fight the party runs away from more than the one they win, and having an encounter you can describe evocatively matters more than one you can statblock precisely.

FAQ

How long should a 1920s investigator survive at the table? Longer than the tradition suggests. Character death is part of the genre, but a well-built investigator with a real secret is worth keeping alive for two or three scenarios so the player gets to see the secret pay off.

Do I need to know the Roaring Twenties in detail to play one? No. You need three or four solid period touches you can drop into a scene — a specific speakeasy, a real newspaper, a car model, a slang phrase — and a willingness to say "I'm not sure, but my character wouldn't have heard of that yet" when something modern slips in. The Keeper is not grading your history knowledge.

Should my investigator already believe in the supernatural? Almost always no, at the start. The genre works best when the character enters the scenario with a rational worldview and has it stress-tested. A character who already believes has nowhere to go emotionally when the first strange thing happens.

Is it okay to play a character with modern politics in a 1920s game? It's okay to play a character with modern sensibilities — plenty of real people in the 1920s held views that would read as progressive now. What breaks the fiction is anachronistic vocabulary. A character can privately think their colleague is wrong about women's suffrage without using twenty-first-century framing at the table.

What if I roll a card I don't connect with? Reroll. The tool is fast on purpose. A card that doesn't make you want to play the character is a bad card for you, regardless of how well the individual pieces are written. Sometimes the dice hand you three ingredients that don't cook together — that's a rerolling problem, not a writing problem.

The three-line template outlasts any one system or setting. It works because it forces the writer to answer the questions the table will actually ask: what does this character do when they walk into a room, what are they hoping nobody notices, and what will make them stop moving. Get those three right and the rest of the sheet is bookkeeping.