What I'm suggesting is a murder mystery.
Set out as a SB/RP/game thingy/(to be honest I'm not entirely sure) everyone plays a character with a secret or two to hide and one of them is a murderer, but no one knows who.
Stay with me while I explain it badly...
I'm imagining that the initial murder victim would act as some kind of host, adding the occasional summary of where the mystery is so far and working with whoever the murderer is to write the murder and lay possible clues to guide the other characters along.
In the beginning, only the host knows who the murderer is as well as possibly the secrets of the other characters. Their death would most likely be the thing to initiate the story.
The other characters could work together or alone to figure out who the true culprit is but none are allowed to reveal themselves entirely.
The mystery progresses until either the murderer is caught or all the other characters have been disposed of (by death or other means).
I hope that gives a bit of a picture of what I mean. Either way, I only came up with this today so it is still on the sketchy side and I'm not even entirely sure if it would work.
I mainly just put it here to see what anyone else thought of it.
All in all, I've been a little obsessed with Agatha Christie recently
