Arduous is the Arduboy emulator implemented as a libretro core, usable inside RetroArch. The official documentation describes it as a small core with a narrow feature set: it loads .hex content, exposes no core options, and lists none of the common RetroArch features (save states, rewind, cheats, disk control) as supported.
Core identity
The core is named Arduous, its library name is "arduous," and it is authored by James Roeder. It is released under the GPLv3 license. RetroArch maintains a separate summary of the licenses used across the software and its cores.
Supported content
The documentation lists .hex as the content extension the core loads. For metadata and box art, the Arduboy Inc - Arduboy database entry is the matching libretro database reference.
Feature support and limitations
The documented feature table marks every listed feature as unsupported: save states, rewind, core options, RetroArch cheats and disk control. The documentation also states plainly that the core has no core options, so there is no core-option menu to configure.
Getting started
The official page documents the core's type, content extension, author, license and feature list; it does not include a step-by-step installation or loading procedure. The only content-handling detail it specifies is that the core takes .hex files. Because no setup walkthrough is documented, this article does not invent one.
Where to follow development
The documentation points to the Arduous source repository and its issue tracker for reporting core problems.
Reference table · Scroll horizontally to see all columns.
| Feature | Documented status |
|---|---|
| Save states | Not supported |
| Rewind | Not supported |
| Core options | Not supported |
| RetroArch cheats | Not supported |
| Disk control | Not supported |
Sources & references
Content responsibility: FrameTinker editorial desk. Source authors and software maintainers are credited separately below; this is not a claim of hands-on testing.
Published .
RetroArch: arduous — official gaming software documentation https://raw.githubusercontent.com/libretro/docs/master/docs/library/arduous.mdRetrieved Nov 1, 2026Something doesn’t match your setup?
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