I recently came across this website: https://letterlarp.home.blog/ which really intrigued me.
I’ve played in a failed game of De Profundis and I think I know some of the reasons it failed, players mis-estimating their available time for long-form letter writing and early letters getting lost in the post that killed the momentum.
But a letter larp remains my great white whale. I’d love to know what ideas everyone has on how to make something like this a success - in terms of player momentum, asynchronus play and all that stuff. There is a section on the site I linked to about running such things but I don’t think it really digs into a lot of the reasons why such games fail.