[Lazare]

PBEM (Play By Email) was (and maybe still is) a big thing in the wargaming space. Long, long ago I was part of a group on USENET and later IRC that organised games of Stars! (https://en.wikipedia.org/wiki/Stars!) with typically a cadence of a few turns per week, or sometimes "blitz" games played onn IRC with several turns per hour.

Quite fun, but needs a community interested in such, and very focused game design. (Specifically, need lots of meaningful decisions to be made each turn, but relatively few turns in a game.)

Stars! was one of many such games back in the day, but I'm pretty sure they're all dead now.

[klez]

My google-fu is failing me. Is there some sort of community for play-by-email games that explicitly lists games that are still active? All the interesting games I came across look dead.

[antifa]

Play-by-web is also a term, e.g. Advanced Wars by Web.