For a large group, Broadway Murder Mysteries' 80s Mall Murder Madness is the strongest pick: 20 scripted suspects, and anyone beyond 20 plays a detective. Murderous Decisions' Murder at the Pizzeria fits any 6 to 14 guests because the killer is chosen on the night. For 20 or more coworkers, run teams on copies of The Crypto Killer.
Scalable murder mystery kit — A murder mystery party game whose script works across a range of guest counts, because the culprit is assigned on the night and spare roles or detective parts absorb late additions and cancellations.
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At a glance
| Game | Players | Playing time | Age | Setting | Format |
|---|---|---|---|---|---|
| Broadway Murder Mysteries: 80s Mall Murder Madness | 4-20, plus extra guests as detectives | About 1-2 hours, depending on group size (publisher FAQ) | — | 1980s shopping mall | Party kit: 20 character scripts, host guide, evidence booklet and files, question menu, online host dashboard |
| Murderous Decisions: Murder at the Pizzeria | 6-14 | — | — | Italian restaurant on opening night | Party kit: murderer chosen on the night, host can play, audio files for each act |
| Talking Tables Murder Mystery: On the Dancefloor | 5-13 | — | 16+ | 1970s New York nightclub | Reusable party kit with props, clues and 3 alternative endings |
| Professor Puzzle: The Crypto Killer | 1+ | About 60 min | 12+ | — | Card-based case: 54 cards, 4 crime scenes |
| Cryptic Killers: Murder of a Millionaire | Solo or group | About 2 hours | — | — | Case file, 29 pieces of evidence + online inbox |
Our picks
Broadway Murder Mysteries: 80s Mall Murder Madness
Twenty scripted suspects, a killer drawn at random from slips, and a detective role for anyone beyond the cast, so the same kit runs for 8 or for 25. The publisher rates it easy and says costumes matter more than clues, which suits a social crowd. Groups who want hard deduction will find it light.
Murderous Decisions: Murder at the Pizzeria
Plays with any mix of 6 to 14 guests, chooses the murderer on the night and lets the host play, so late cancellations do not break the story. Guilty and innocent suspects get different versions of their story, which keeps the final vote grounded in clues. Above 14 people you will need another format.
Talking Tables Murder Mystery: On the Dancefloor
A boxed 1970s party with 12 suspect roles plus a host part, so 13 people play from one box, with physical props, clues and three alternative endings for a second outing. Listed for 16 and up. It tops out at 13, which makes it the pick for a long dinner table rather than a party of 20.
Professor Puzzle: The Crypto Killer
A one-hour case in 54 cards with four crime scenes, played solo or by a small group, which makes it easy to buy one copy per team and run a timed race. Rated for 12 and up. Each copy is solved once, so you need as many boxes as teams.
Cryptic Killers: Murder of a Millionaire
Twenty-nine pieces of physical evidence plus an online police inbox, rated 3.5 out of 5 by its publisher for about two hours of play. Teams of four to six can split the paperwork and compete on time. It is too demanding for a casual party crowd.
Why big groups break most mystery games
Most murder mystery games are designed for a table, not a room. A boxed case usually ships one copy of each document, so past five or six people the group splits into readers and spectators. A classic dinner party kit has the opposite problem: it is written for exactly eight characters, and if one guest cancels the afternoon of the party, the clue that guest was supposed to reveal goes missing with them.
A murder mystery for a large group has to solve both problems. Every person needs something to do for the whole evening, and the story has to survive a guest list that changes until the doorbell rings. The five games on this page each handle scale in a different way, and the right one depends on how many people you expect and whether they want to act or to investigate.
Three ways to run a mystery for 10 to 20+ people
| Format | Comfortable size | Example on this page | How it scales | Host workload |
|---|---|---|---|---|
| Party kit with a large cast | 10 to 20, more as detectives | Broadway Murder Mysteries: 80s Mall Murder Madness | 20 scripted suspects, extra guests become detectives | Medium: assign roles, run the rounds |
| Flexible-cast party kit | 6 to 14 | Murderous Decisions: Murder at the Pizzeria; Talking Tables: On the Dancefloor | Killer chosen on the night, roles added or dropped | Medium: casting and pacing |
| Parallel teams on boxed cases | 12 to 40 or more | Professor Puzzle: The Crypto Killer; Cryptic Killers: Murder of a Millionaire | One copy per team of 4 to 6 | Low during play, more logistics before |
The first two formats are role-play. Guests read a character booklet, answer questions in character and vote on the culprit. The third is pure investigation: nobody acts, and teams compete to solve the same case first.
How the five picks scale
Broadway Murder Mysteries writes every game for 20 characters with full motives, and according to its FAQ any of them can be the murderer. In person, the killer is assigned with “Who Did It” slips drawn from a hat. Above 20, extra guests become detectives who question the suspects each round and guess the killer at the end. The kit includes a host guide, an evidence booklet, evidence files and a question menu, and the online dashboard adds evidence videos narrated by Broadway actors and an invitation tool that emails each guest a character before the party. The publisher puts its games at about one to two hours, depending on group size.
Murderous Decisions, from the UK studio D’Avekki, is built around the cancellation problem. The publisher says its games play with any combination of 6 to 14 guests, that no one is “bolted on”, and that the murderer is chosen on the night. Murder at the Pizzeria is set on the opening night of an Italian restaurant, and the publisher hosts audio files for the starting evidence and each of its three acts. Suspects tell a different version of their story when they are guilty, so the final accusation rests on clues rather than a guess.
Talking Tables’ On the Dancefloor is a physical boxed party set in an invented 1970s New York nightclub. A bookseller’s listing describes 12 place, name, trait and occupation cards, 12 prop weapons, 2 police crime files, 28 clues, 48 accusation forms and 3 award trophies. The host plays a character who is not a suspect, which explains the 5 to 13 range on the Amazon listing. Three alternative endings let you run it again for another group.
Professor Puzzle’s The Crypto Killer is a single case told in 54 cards, with four crime scenes and a reference chart. Players examine evidence and solve small puzzles to name the culprit in about an hour. For a large group it works as a race kit: one copy per team, the same start signal, and the first correct accusation wins.
Cryptic Killers: Murder of a Millionaire is the heavier option for teams. The file holds 29 pieces of physical evidence, and part of the investigation happens in an online police inbox that teams must get into. The publisher rates it 3.5 out of 5 and estimates about two hours.
How to pick between them
- A birthday or holiday party of 12 to 20 who like costumes: Broadway Murder Mysteries. The cast is big enough that nobody sits out, and late arrivals can join as detectives.
- A dinner of 8 to 14 where RSVPs are shaky: Murderous Decisions. Since the killer is decided at the party, you cast whoever turns up.
- A seated dinner of 10 to 13: Talking Tables. Twelve suspects plus the host fill a long table, and the three endings mean the box earns a second outing.
- An office event of 15 to 40 who prefer solving to acting: The Crypto Killer, one copy per team of four to six.
- Experienced puzzlers or a competitive team day: Cryptic Killers, with a hint policy agreed in advance.
If your guest count is closer to eight, our comparison of murder mystery party games covers kits written for a fixed cast. For teams that want more files to race through, the best cold case games ranking lists other cases that split well between readers.
Running teams in parallel
Parallel play turns a game made for four into an event for forty. It needs a little structure:
- Size the teams. Four to six people per team. Fewer than four and the reading load drags; more than six and people drift.
- Buy identical cases. Every team should solve the same story, so the debrief at the end compares reasoning, not plots.
- Fix the hint rules. Decide whether teams may open hints and whether each hint costs time. Cryptic Killers’ website moves from subtle hints to full answers, so cap how far teams may go.
- Use one clock. Start all teams together and record the time of each correct accusation.
- Debrief. Ask each team to explain the one clue that cracked it. That conversation is often the best part of a team-building session.
Remote colleagues can play this way too. Our guide to a virtual murder mystery explains how to run a boxed case over a video call.
Planning tips for a big party kit
- Cast early. Send roles a week ahead so guests can plan costumes; Broadway’s invitation tool does this by email.
- Plan for time. Broadway’s FAQ suggests budgeting about 10 minutes per player, so a full cast of 20 fills an evening.
- Name tags matter. With 15 suspects in a room, guests forget who is who. Pin character names to every costume.
- Give quiet guests a detective part. Not everyone wants to perform; a detective badge and the question menu keep them involved without a script.
- Name a backup host. In a big room, the host spends the night handing out clues. A co-host can watch the time and keep rounds moving.
- Set up stations. Put evidence, the question menu and the voting slips in separate corners so 20 people are not crowding one table, and collect accusations in a box before the reveal.
First-time players will find the basics in our guide to murder mystery for beginners, and every group format is gathered in the mystery games by group topic.
What to check before buying
- The player range on the listing, not the box art. “Up to 20” sometimes means 20 with detectives; read whether detectives have a real role.
- Whether the killer is fixed. A fixed killer makes the kit single-use and fragile if that guest cancels.
- Age guidance. Talking Tables lists its kit for 16 and up, Broadway Murder Mysteries recommends most of its mysteries for 13 and up, The Crypto Killer is rated 12+, and Cryptic Killers pitches its cases at teens and adults. Check the theme before inviting younger teens.
- Online steps. Broadway relies on a web dashboard and Cryptic Killers on an online inbox, so you will need a phone or laptop with a connection.
Key facts
- Every Broadway Murder Mysteries party includes 20 scripted characters with full motives, any of whom can be the murderer; the publisher recommends 3 to 20 players and adds that more than 20 can play as detectives who ask questions each round and guess the killer at the end.Broadway Murder Mysteries, FAQ, 2026
- Murderous Decisions games play with any combination of 6 to 14 guests, everyone is a suspect, and the murderer is chosen on the night, so the party still works if someone cannot come; expandable editions sell extra characters for bigger groups.Murderous Decisions (D'Avekki Studios), 2026
- Talking Tables' On the Dancefloor, set at an invented 1970s New York nightclub, is listed for 5 to 12 players aged 16 and up, with the host playing a non-suspect character, 48 accusation forms, 3 alternative endings and rules for playing over a video call.Tattered Cover Book Store, Murder Mystery: On the Dancefloor, 2025
- Murder mystery party games typically involve groups of 6 to 20 people, and interactive versions are also used in team-building settings.Wikipedia, Murder mystery game, 2026
How we selected these games
We started from murder mystery games and party kits sold on Amazon.com and in stock on October 25, 2026, and kept only those that state how they handle ten or more people: a published player range that reaches at least 12, a rule for extra guests, or a format that a big group can split into teams. We checked those claims against publishers' FAQs and product pages and a bookseller's listing. We left out kits built around a bar or tasting theme, kits sold on mature content, games built on real criminals, and hidden-killer tag games with no investigation. Only one game per format made the list. We have not played these games: the descriptions come from publishers' information and retailer listings. Affiliate commissions do not decide which games appear or their order.
FAQ
How do you do a murder mystery for a large group?
Pick a format built for your head count. Up to about 14 guests, a party kit where everyone plays a suspect works well. From 15 to 20, choose a kit with 20 roles, such as Broadway Murder Mysteries, and give extra guests detective parts. Above that, split people into teams of four to six and give each team its own copy of a case.
How many people do you need for a murder mystery party?
Most party kits need at least five or six players so there are enough suspects to keep the culprit hidden. Murderous Decisions games start at 6 guests, Talking Tables' On the Dancefloor at 5, and Broadway Murder Mysteries recommends 3 to 20.
Can 20 people play a murder mystery game?
Yes. Broadway Murder Mysteries writes 20 scripted characters into each game, and guests beyond the cast join as detectives who question suspects every round and vote at the end. Alternatively, run five teams of four on separate copies of the same boxed case.
What happens if a guest cancels at the last minute?
With a kit that assigns the killer on the night, nothing breaks. Murderous Decisions picks the murderer at the party, and Broadway Murder Mysteries uses slips drawn from a hat, so you simply hand out fewer roles. Fixed-cast kits are riskier if the missing guest held a key part.
Is a murder mystery a good team-building activity?
It can be, if the format fits the room. Interactive murder mysteries are used for team building, and boxed cases work well for coworkers who prefer solving to acting: teams of four to six race on identical copies, then compare their reasoning at the end.