Planescape

Planescape is a fictional universe within tabletop role-playing games like Dungeons & Dragons, depicting a vast multiverse composed of interconnected realms called "planes." Each plane represents a different aspect of existence—such as eternal cities, chaotic chaos dimensions, or divine realms—and has unique landscapes, laws, and inhabitants. These planes are linked by portals and travel routes, allowing adventurers to explore diverse worlds beyond the material universe. Established as a rich, layered setting, Planescape emphasizes philosophical exploration, diverse cultures, and the interplay between different levels of reality, creating a complex, immersive backdrop for storytelling and adventures.