English

Celeste is PSPACE-hard

Computational Complexity 2022-11-23 v1

Abstract

We investigate the complexity of the platform video game Celeste. We prove that navigating Celeste is PSPACE-hard in five different ways, corresponding to different subsets of the game mechanics. In particular, we prove the game PSPACE-hard even without player input.

Cite

@article{arxiv.2211.11839,
  title  = {Celeste is PSPACE-hard},
  author = {Lily Chung and Erik D. Demaine},
  journal= {arXiv preprint arXiv:2211.11839},
  year   = {2022}
}

Comments

15 pages, 13 figures. Presented at 23rd Thailand-Japan Conference on Discrete and Computational Geometry, Graphs, and Games

R2 v1 2026-06-28T06:24:58.254Z