Detective Roleplay Prompts

Twenty original detective and noir roleplay prompts: locked rooms, missing persons, rain-streaked offices and clients who lie. Each has a hook and a first message ready to paste. All cases, cities and characters here are invented.

Detective stories are made for roleplay: questions and answers, clues and lies, a puzzle that two people solve (or fight over) together. Noir adds the mood: moral grey areas, cynical narrators, and a city that keeps its secrets.

Pick your detective style

• Classic puzzle: a clever detective, a closed circle of suspects, a fair-play solution.
• Noir: rain, shadows, corruption, nobody's clean.
• Police procedural: evidence, interviews, partners, paperwork.
• Cozy: a small town, an amateur sleuth, low violence.
• Supernatural: the crime can't be explained by ordinary means.

For structuring any of these, see how to run a mystery roleplay.

Noir

1. The client with the wrong name. A woman hires you to find her missing husband. The name she gives you belongs to a man who died ten years ago.

I slide the death certificate across the desk. "Your husband's been dead since '79, ma'am. So who exactly am I looking for?"

2. The cop who owes you. A detective you once saved from a career-ending scandal shows up at 3am, needing a favour you can't refuse.

He's dripping rain on my office floor. "I need you to find a witness before my own department does." "Why?" "Because they'll kill her."

3. The jazz club. The singer at the city's most exclusive jazz club has hired you. She thinks someone is trying to kill her through the songs she's asked to sing.

She hands me the setlist. "Every song this week was written by a man who died the day after I sang it last."

4. The last case. You're retiring tomorrow. A stranger walks in with the file on the one case you never solved.

The file's yellowed, the photo faded. "Twenty-two years I've looked at this face. Where did you get it?"

Classic puzzles

5. The locked study. A wealthy collector is found in his study, locked from the inside. The only key is in his pocket.

I crouch by the door, examining the lock. "No scratches. No forced entry. The key's in his waistcoat. So either he locked himself in, or someone wants us to think he did."

6. The dinner party. A guest collapses at a dinner party. Eight suspects, one storm, no phone signal.

I stand at the head of the table. "Nobody leaves. Nobody touches their glass. Let's start with who poured the wine."

7. The vanished painting. A famous painting has vanished from a gallery during a crowded opening. The frame is still on the wall.

I run my finger along the inside of the empty frame. "This was cut out with a scalpel. Neatly. By someone who's done it before."

8. The train. Somebody was murdered on the overnight train. The conductor insists nobody got on or off.

I hold up the victim's ticket. "He was in carriage C. His ticket's for carriage F. So who sat in his seat?"

Missing persons

9. The runaway heiress. An heiress has vanished the week before her wedding. Her family wants her back. You suspect she doesn't want to be found.

I find her working the counter at a seaside café, hair dyed, name changed. "Your father's paying me a lot to drag you home." "Are you going to?"

10. The missing professor. A professor disappeared from a locked lecture hall mid-lecture. Forty students saw it happen.

I interview the front row. "He just… stopped talking. Turned toward the chalkboard. And then he wasn't there."

11. The brother. Your client's brother went missing three days ago. Everyone in his life is lying about where he was that night.

I lay four statements on the table. "Four people, four alibis. And every one of them puts him somewhere else at nine o'clock."

12. The child's drawing. A missing girl's last drawing shows a house no one in town recognises.

I hold up the crayon drawing. "Blue door, three windows, a tree shaped like a hand. Has anyone seen this house?"

Procedurals and partners

13. The new partner. You've been assigned a new partner on a homicide case. They're brilliant, rude, and refuse to explain how they know things.

"The victim was left-handed, owed money, and was meeting someone he trusted." My new partner glances at the body for two seconds. "Shall we?"

14. The informant. You're a detective. Your best informant has just told you the killer is someone inside your department.

She grips her coffee with both hands. "I'm not saying any names in here. Walls have ears. And badges."

15. The cold case. A new DNA result has reopened a thirty-year-old case. The new suspect is your mentor.

I set the lab report on my captain's desk. "Before you say anything, I checked it twice."

16. The interrogation. A suspect has confessed. You don't believe them.

I sit across from the suspect in the interview room. "You're confessing to a murder you couldn't have committed. You were in another city. Who are you protecting?"

Cozy and supernatural

17. The village show. The prize-winning marrow at the village show has been sabotaged. The whole village is a suspect.

I hold up the ruined vegetable. "This wasn't an accident, Mrs. Pemberton. Someone wanted you to lose."

18. The bookshop mystery. Every night, books in your shop are rearranged into a message.

The spines on the third shelf spell something now. I read it out loud. "'Look under the floor.'"

19. The ghost witness. The only witness to a murder is a ghost who can't remember her own name.

"I saw everything." The ghost flickers in the corner of the crime scene. "I just can't remember who I was when I saw it."

20. The case that rewrites itself. The details in your case file keep changing overnight. Only you seem to notice.

I stare at the file. "Yesterday the victim had brown eyes. Today it says blue. Who changed this?"

Tips for detective roleplay

• Interview with specific questions. "Where were you at nine?" not "Did you do it?"
• Examine objects. Characters reward investigation with clues.
• Keep notes. Outside the chat or in brackets.
• Let everyone lie a little. In noir, nobody tells the whole truth.

For twists to drop in mid-case, see plot twist ideas. For academic mysteries, try the dark academia prompts, and for the other side of the law, the heist prompts.

Detectives on Minkplay

Detective Sarah Chen has recruited you as an informant. Silas investigates the unexplained near the fog-choked docks. Julian, the vampire detective, has a century-old disappearance to reopen. Valerie breaks codes for the Royal Navy. More are listed below.