Licensing

Shadow Engine is dual-licensed. It is not distributed under a permissive MIT, BSD, or ISC-style license.

GPL-3.0-or-later

You may use Shadow Engine under the GNU General Public License v3 or later for games distributed in compliance with the GPL.

This route is intended for free and open-source games whose source is released under compatible GPL terms.

See LICENSE.GPL-3.0 and the repository's LICENSE file for the complete terms and third-party notices.

Commercial license

Commercial distribution uses the proprietary commercial license. Closed-source, sold, or otherwise monetized releases require a commercial agreement with the copyright holder under the terms described by the repository.

See LICENSE.COMMERCIAL for the current commercial terms.

Third-party components

Shadow Engine includes or integrates third-party software that remains under its own licenses, including SDL2-family libraries, Box2D, RtAudio, AudioFile, and hidapi. The top-level LICENSE file is the canonical source for those notices.

Note

This documentation summarizes the repository's licensing model for navigation purposes. The license files themselves control.