STACK Engine is a free and open .NET framework dedicated to create 2D point & click graphic adventure games for desktop PCs. While being currently under development, its source code is already hosted at GitHub.
'Session Seven' is the first point and click adventure game using the STACK engine. It is also open source and free. Release date was march 2019.
The engine's features were chosen carefully to make development of point & click adventures as easy and comfortable as possible while not getting in the way of the developer. Any game logic is written in C# enabling the broad range of .NET's capabilities. Great value was placed on having a testable architecture which allows to write tests that solve your whole game within just a fraction of a second and giving you immediate feedback if something doesn't work as expected.