I’m currently reading Ngaio Marsh’s A Man Lay Dead, which is the usual murder in a country house thing. The twist: the murder happens when everyone is playing a “murder game”, a proto larp where someone is designated a killer, “kills” someone by getting them alone and saying a code phrase, then signals the whole house. I’ve played this sort of proto larp myself, and I was curious as to how far back it went. Fortunately we have Papers Past and Trove to help…
Here’s a report from the Hawkes Bay Tribune about the popularity of the game among the fashionable set in London:
https://paperspast.natlib.govt.nz/newspapers/HBTRIB19300823.2.68.4
And one from the Waikato Times about it catching on in Sydney:
https://paperspast.natlib.govt.nz/newspapers/WT19310221.2.136.14.10
And a report from The Australian woman’s mirror about playing it in 1943:
And, inevitably, the actual murder which took place in one: