doukutsu-rs

doukutsu-rs reimplements the Cave Story engine in Rust with quality-of-life improvements and support for original game data files.

github.com/doukutsu-rs/doukutsu-rs
doukutsu-rs homepage screenshot

About doukutsu-rs

doukutsu-rs is an open-source reimplementation of the Cave Story (Doukutsu Monogatari) engine written in Rust. It does not contain game data files and must be paired with supported files from the freeware release, Cave Story+, or the Nintendo Switch version.

It provides builds for Windows, macOS, Linux, and Android, plus a Switch homebrew port, and can be used as a drop-in replacement for CaveStory+.exe. Stated limits include no support for the Steam (2026) release and for Switch 1.0 data without update, and incompatibility between remastered and original save files.

Key features

  • Runs Cave Story using freeware data files
  • Works as drop-in replacement for CaveStory+.exe
  • Supports Nintendo Switch data files with update included
  • Provides builds for Windows, macOS, Linux, and Android
  • Automatically extracts embedded resources on first freeware startup
  • Mounts Switch data automatically in Title Override homebrew mode
Best for: People who already have Cave Story data files and want to play them on modern Windows, macOS, Linux, Android, or Switch homebrew systems.
Good for
  • Open-source engine reimplementation in Rust
  • Supports freeware, Cave Story+, and Switch data files
  • Available for Windows, macOS, Linux, Android, and Switch homebrew
Watch out for
  • Requires separate supported data files, which are not included
  • Steam (2026) release is not yet supported
  • Remastered saves are incompatible with original version saves

doukutsu-rs at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Platforms
Android, Linux, macOS, Windows
Open source
Yes · Source code
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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doukutsu-rs FAQ

Does doukutsu-rs include game data files?
No. It must be paired with supported data files, which are not contained in the repository.
How do I use it with the freeware version?
Place doukutsu-rs in the same directory as the original Doukutsu.exe. On first startup it extracts embedded resources into the data directory.
Does it support Nintendo Switch version 1.0?
No. Dumped files must include the update/DLC, as 1.0 isn't supported.
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