Antichamber
- link: https://store.steampowered.com/app/219890/Antichamber/
- category: 3D adventure game
- release year: 2013
- developer: Alexander Bruce
- publisher: Demruth
- description:
- A spatial progression where moving forward leads to an infinitely continuing path, but the moment you turn around to retrace your steps, a new path appears.
- An implementation of space where two spaces appear to be superimposed at a single location.