There are no plans.

Multi-player is something that usually has to be done from the beginning. It's easier to make multiplayer choices first, e.g. put all of the game logic in a server, and make single player just run from a local server.

Flare isn't built that way. The game is simplified in ways that won't work for multiplayer (e.g. fixed time step). It means we can actually make and finish a nice single player game, where a multiplayer game would take much longer to develop.

My expertise isn't in multiplayer games, and I vastly prefer single player games. That, combined with choosing a project scope I can actually finish, is why Flare is single player.

Now, some people are working on multiplayer support. Best of luck to them, and if they get it working great I'll include it in baseline Flare.

To those people, though, I would really suggest taking an existing proven multiplayer engine and building an action RPG on it using Flare's assets, rather than trying to make Flare a multiplayer engine. Maybe I'm overestimating how difficult a solid multiplayer code base is though.

So for now, Flare is lightweight and is actually getting done because it's been simplified. Maybe Flare 2.0 or 3.0 could have a bigger multiplayer focus? We'll see where the project goes.