Unity - The multiplatform game creation tools for everyone.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Polycode - Polycode is a C++ and Lua framework for building interactive applications.
RenPy - Ren'Py is a free and cross-platform visual novel engine that helps you use words, pictures, and...
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Quest - Quest lets you create sophisticated text-based games, without having to program.