I have this idea where grotesque invisible monsters try to fix reality gitches in modern day Earth homes. The name I have for the game is “Tryst”, meaning a secret meeting.
The whole thing is a bit weird. Let me start at the beginning.
The concept is based in the mask-work of improvisational theatre guru Keith Johnstone. Johnstone discovered that improvisational work with grotesque masks often brings out architypal and usually infantile personalities in people, especially if you do a fair amount of freeform rehearsal in mirrors and interacting with other mask-characters, all while wearing the masks. In Tryst, some of the players wear prosthetics to make them into grotesque trolls and play them as baffoons in the Johnstonian tradition.
Some of the players would be (mostly) ordinary modern people, and some would be these idiotic creatures (in full-body prosthetics) that suddenly arrive and must try to solve a cosmic conundrum, an error in reality. A different problem each time the game was run. The people go about their daily lives and usually cannot see the trolls unless they become obstructive. The trolls have to be careful not to disturb reality (get noticed) too much, so they’ll often be doing a lot of bumbly sneaking.
The play is finding out about the glitch (both for humans and trolls), and the hook is in the inherent comedy of invisible grotesque imbeciles trying to solve a complicated problem. Like Inspector Gadget on a bad acid trip.
From a practical perspective, it has the advantage that you can play it in an ordinary house. The impractical bit is the makeup.