Launching a Game in a Game

Hi There, I know that this may be a weird topic but here we go…

I’m looking at setting up a “container” game. Basically a game that does some basic things and has a section in it for playing mini-games.

What I’d like to do is have the container game released, and as our team builds smaller mini-games I can add those to the container game without having to recompile/re-release that game.

I’m tossing around the idea of maybe setting up some streaming games (info to access can be set up in a cloud-based database); something like Google’s new Stadia or something similar. In a perfect world I’d like my people to build the mini-game with their platform of choice and somehow get it accessible from the container game.

Any ideas/hints?