A side project I've been playing with during my free time: Gomps is a tool that adds basic online multiplayer features to any Unity game with the press of a button. Here is Firewatch by Campo Santo , Obra Dinn by Lucas Pope , and Ynglet by Nifflas (inactive).

@camposanto @dukope @Nifflas First person games often work right away, but other genres need specific configs. In these examples only Ynglet required a custom configuration, since there's no way to "guess" where the player character is. And then these configs get downloaded automatically by players.

@camposanto @dukope @Nifflas I have a Steam page for the app (it will be free and should release in the next couple days):

@unity @camposanto @dukope @Nifflas I've done a bit of unity modding, enough to see this is some serious technical wizardry. Does it work with the IL2CPP backend? How?

@unity @camposanto @dukope @Nifflas It does :) I build the same mod with a few different variants: one for il2cpp, one for mono, one for very old Unity games.

@unity @camposanto @dukope @Nifflas do individual developers need to add Gomp support for their game? or is this some kind of weird unity wrapper that is somehow game-agnostic ?

@unity @camposanto @dukope @Nifflas They do not, it's all modded-in

@unity @camposanto @dukope @Nifflas Wow! This is really cool! Does it use Steam's multiplayer system or does it work independently of Steam?

@unity @camposanto @dukope @Nifflas It does not, I have a small server hosting it. Would be nice to use Steam's servers but it makes things a bit more complicated for a project like this. But I use Steam as a way to identify players between the game and a web app that players can use to leave notes or send commands

@unity @camposanto @dukope @Nifflas I can imagine this would be great for interacting with streamers! Cool stuff!

@unity @camposanto @dukope @Nifflas Yep, that is a perfect use case! People can't really affect your game but they can walk around with you, leave notes around the game worlds, etc. More like a social thing than actual multiplayer I guess.