Ren'Py

Ren'Py is an open-source visual novel engine that enables users to construct interactive stories using text, images, and sound that can be played on desktop computers as well as mobile devices. This engine is utilized by thousands of authors from all over the world. These can take the form of either life simulation games or graphic novels. The straightforward scripting language makes it possible for anyone to develop big visual novels quickly, while the game's Python programming is sufficient for even the most difficult simulation games.