Somehow deals with impossible geometry.
Alternate names: Impossible objects, Undecidable figures, Impossible figures, Impossible architecture
The first video game about Impossible geometry was released on January 29, 1996.
Simplest method to accomplish this when no visual component is needed is via a portal-based game engine. For when the impossibility is immediately observable, it requires far more interesting solutions.
See also: non-euclidean geometry