Realtime collaborative _thing_. It's super clear. Trying to steal a term already used to mean other things, namely playing video games with more than one person

Realtime collaborative _thing_. It's super clear. Trying to steal a term already used to mean other things, namely playing video games with more than one person, is a terrible idea. You have words already that mean what you want, and everyone understands them. Google docs is a realtime collaborative word processor. Git is a collaborative source control system. If you told me that Multi is a realtime collaborative editor then I'd instantly understand. But trying to say that my OS needs to be multiplayer is just confusing buzzword bingo.