Ren'Py

Ren'Py, known in full as the Ren'Py Visual Novel Engine, is a free and open-source game engine which facilitates the creation of visual novels. It was developed for and targeted at multiple platforms, including Microsoft Windows and Linux. The engine allows movie playback for animated sprites, full-screen movies, in-engine animation, and full animation and customization of UI elements via the feature "Screen Language". The Ren'Py software development kit is officially supported on Windows, Linux, and recent versions of macOS; and can be installed via the package managers of the Arch Linux, Ubuntu, Debian, and Gentoo Linux distributions. Ren'Py features a built-in tutorial game that demonstrates core features such as dialogue scripting, adding images, transitions, music and effects, branching choices, and other functionalities.