How Many People Do You Need for a Murder Mystery Party?
Eight is the floor and twenty is the ceiling. What to do when someone drops out on the day.
The honest range is eight to twenty. Both ends of that are there for a reason.
Why eight is the floor
A mystery works because each guest knows something the others do not. Below eight, there are not enough secrets in the room. Everyone has spoken to everyone within ten minutes, the information runs out, and the middle of the evening sags.
If you only have six committed, wait rather than shrink it. A mystery played thin is the version people remember, and it puts them off the next one.
Why twenty is the ceiling
Above twenty, two things break at once. People cannot hear each other, so the conversations that carry the game stop happening. And the quieter guests never get their turn — they hold a card with a crucial secret on it and go home without using it.
If you genuinely have thirty people, run two tables with two kits rather than one enormous game.
When somebody drops out on the day
This happens, and it is not the disaster it feels like at six o'clock.
Every kit here marks which characters are essential to the solution and which are not. Pull a non-essential character, and the game still resolves — you are removing a red herring, not a load-bearing wall. The host guide says which is which, so check it before you panic.
Never pull the murderer. Obviously. If the person who cannot come is holding that sheet, reassign it to somebody who is already coming and hand their original sheet to nobody.
Counting yourself
Decide early whether you are playing. Some kits give the host a character, some keep the host outside the cast.
If you are new to this, stay out of it the first time. You will spend the evening watching how it flows, and the second one you run will be noticeably better for it.
