RPG Paper Maker is a game maker engine including a 3D universe with many 2D sprites and some simplified 3D objects. Pretty close to the RPG Maker series, RPG Paper Maker finally give a way to create RPGs in a totally 3D universe as easier as it is in 2D!
Go to the Engine directory and find the application RPG Paper Maker.exe. Run it.
You can find all the source code into the RPG Paper Maker directory (*.cs files). The solution ("RPG Paper Maker.sln") has been created with Visual Studio Community 2015 on Windows 7 64bits, MonoGame 3.3, and a Windows Forms Application.