Game Definition File Editor project
File type: Various data file
The gdfmakerproject file extension belongs to project files created by the Game Definition File Editor.
The editor was distributed as part of Microsoft's DirectX SDK for Windows.
File type category:
Various data file
Date updated: October 3, 2026
The Game Definition File Editor is a Microsoft development tool included with the DirectX SDK. It helps developers create and maintain game definition data for Windows games.
A gdfmakerproject file stores a project used by the Game Definition File Editor. It belongs to the editor's project workflow rather than being a standalone game or executable file.
The DirectX SDK and this editor are legacy Windows development tools, so the format is mainly encountered in older game-development projects.
Open a gdfmakerproject file on Windows with the Game Definition File Editor from a compatible DirectX SDK installation. The file is intended to be opened from within that editor rather than as a document in a general-purpose application.
To use the project data in another format, open the gdfmakerproject file in the Game Definition File Editor and use any available save or export functions.
Software applications that can open gdfmakerproject files:
Microsoft Windows
Software applications that can edit gdfmakerproject files:
Microsoft Windows
Software capable of saving gdfmakerproject files:
Microsoft Windows
Software apps that create gdfmakerproject files:
Microsoft Windows
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