ForceD3D9On12 is described as 'This project provides DLL wrappers for the DirectX 1-9 graphics components. Its purpose is to disable the use of the Direct3D 9 user-mode display driver provided by GPU vendors. This forces the runtimes to use D3D9On12 instead' and is an app. There are more than 10 alternatives to ForceD3D9On12 for a variety of platforms, including Linux, Windows, Wine, Flathub and Mac apps. The best ForceD3D9On12 alternative is Wine, which is both free and Open Source. Other great apps like ForceD3D9On12 are Proton, ProtonPlus, ProtonUp-Qt and Protontricks.