Hello KomaruKirinashi,

Welcome.

No TW title up till now has something like a multiplayer campaign. While the newer titles like RTW and M2TW offer some support for say a PBM, STW and MTW lacked this too.

In the past there were some campaigns run by fans. The strategic part was done on a forum, chatboxes and/or webpages, the tactical battles were played in the foyer (always had to compromise with full units).

If you want a multiplayer Totalwar game, you could check https://forums.totalwar.org/vb/forumdisplay.php?f=38 for PBM (Play by e-mail) and ask for options there.