Paper by Erik D. Demaine 
- Reference:
-  Lily Chung and Erik D. Demaine, “Celeste is PSPACE-hard”, in Abstracts from the 23rd Thailand-Japan Conference on Discrete and Computational Geometry, Graphs, and Games (TJCDCGGG 2021), September 3–5, 2021, pages 76–77.  
- Abstract:
- 
We investigate the complexity of the platform video game Celeste.  We prove
that navigating Celeste is PSPACE-hard in four different ways, corresponding
to different subsets of the game mechanics.
- Comments:
-  The full paper is available as arXiv:2211.11839. 
- Availability:
-  The abstract is available in PDF (282k).
-  See information on file formats.
- [Google Scholar search]
- Related papers:
-  Celeste_TJM (Celeste is PSPACE-hard) 
See also other papers by Erik Demaine.
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Last updated October 27, 2025 by
Erik Demaine.