canyoumod. GitHub
All games
THE CELESTE FIELD GUIDE

Can you mod
Celeste?

Short answer (Moddable offline): Yes. Celeste (.NET / XNA / FNA) is a good offline starting point for universal-modder with Claude Code. Use Everest and its recommended level editor for a small original map.

Last reviewed · A source-based starting point for universal-modder and Claude Code. Check your exact PC edition and game version before you begin.

YOUR GAME, DECODED

Celeste

.NET / XNA / FNA · PC / offline assessment

Moddable offline

Yes. Start with the right tools.

  • Everest provides a dedicated modding API.
  • Custom levels make a focused first project.
  • Loader and game versions still need to match.
RECOMMENDED ROUTE

Use Everest and its recommended level editor for a small original map.

What you’ll need
  • A licensed PC copy and a separate save backup
  • Claude Code or another supported coding agent + universal-modder
  • Python 3.10+ and ffmpeg (uv recommended)
  • Everest compatible with your game build
  • The level editor recommended by Everest

Only if your idea needs it: fal API key for generated art (billed by fal) · Blender for 3D-to-sprite renders

Your starting prompt

COPY → PASTE → BUILD

Paste this into Claude Code with universal-modder installed.

Use universal-modder to plan a small Celeste mod for my own offline single-player PC copy. Design one short original room with existing mechanics; use Everest documentation and validate the map in-game. First confirm my exact game build and compatible tools, back up my saves, and explain the files you would change. Ask before installing a loader or changing game files. Stop if this requires anti-cheat or DRM bypass. Do not connect to multiplayer. Give me a reversible plan and a concrete in-game verification step.
READY FOR YOUR CODING AGENT
New to universal-modder? Start here
⌘ Under the hood Engine details & sources

.NET / XNA / FNA: Everest is the community mod loader and API for Celeste.

Documentation-based assessment, reviewed 2026-10-04; not tested by CanYouMod. Applies only to offline single-player PC use. A documented loader is not a guarantee that your idea or current build will work.

Upstream knowledge base Source 1
Offline single-player only. Back up your saves.

Documentation-based assessment, reviewed 2026-10-04; not tested by CanYouMod. Applies only to offline single-player PC use. A documented loader is not a guarantee that your idea or current build will work. Unofficial. universal-modder by rehan-remade, MIT.

CELESTE Q&A

Common questions about modding Celeste

Can you mod Celeste with Claude Code and universal-modder?

+

Yes. Celeste (.NET / XNA / FNA) is a good offline starting point for universal-modder with Claude Code. Use Everest and its recommended level editor for a small original map. Everest provides a dedicated modding API. Custom levels make a focused first project. Loader and game versions still need to match.

What do you need to mod Celeste?

+

A licensed PC copy and a separate save backup; Claude Code or another supported coding agent + universal-modder; Everest compatible with your game build; The level editor recommended by Everest.

Is it safe to mod Celeste online or in multiplayer?

+

Keep to offline single-player play with a save backup. This assessment does not cover multiplayer, anti-cheat or DRM-protected sessions.