5D Chess with Multiverse Time Travel

5D Chess with Multiverse Time Travel is a 2020 chess variant video game developed by Conor Petersen at American studio Thunkspace, released for Microsoft Windows, macOS, and Linux. Its titular mechanic, multiverse time travel, allows pieces to travel through time and between timelines in a similar way to how they move through ranks and files. Gameplay begins similarly to ordinary chess, but becomes more complex as players branch additional timelines. Besides the standard starting position, the game features a selection of variant starting positions. Additionally, a puzzle mode is included.

Petersen was inspired to create the game by other chess variants, including bughouse chess, three-dimensional chess, and four-player chess. The game's concept initially came from the idea of using time as a dimension of movement. The game received positive reviews from players and critics.