OpenGMS

A modern Windows-focused editor for GameMaker Studio 1.4 .project.gmx projects.

OpenGMS provides a Dockview workspace, Monaco-powered GML editing, resource editors, and project build/run support. Fast compilation is powered by gmx-rs.

Development

npm install
npm run dev

Open a project directly:

npm run dev -- "C:\path\to\game.project.gmx"

The packaged application accepts the same argument:

OpenGMS.exe "C:\path\to\game.project.gmx"

Commands

• npm run typecheck — check TypeScript.
• npm run build — create a production build in out.
• npm run package — create an unpacked Windows application in release.
• npm run dist — create a portable Windows x64 ZIP in release.

Release

The package version is the release version. From a clean main branch, create and push a version tag:

npm version patch
git push origin main --follow-tags

Use minor or major instead of patch when appropriate. Tags matching v* trigger the GitHub release workflow, which publishes the portable ZIP together with its SHA-256 checksum.