E. Killing lives in a 4D simulation of the 3D world. It's a recording – everything has already happened. Her device, The Horizon, reconstructs her world in time slices, like a slit-scan camera. She needs to find her way out of the simulator.

Horizon, n-Dimensional’s first video game, is a fluid puzzle adventure, with gameplay happening in a three-dimensional slice of four-dimensional space-time. Employing the mathematical principles of slit-scan photography, yet adding a further dimension, Horizon is a distinctly aesthetic exploration of geometry and temporal causality.