SmoothTrack is the best input source for the free OpenTrack software which enables you to use head tracking in your PC games.
SmoothTrack provides you with 6 degrees-of-freedom head tracking for beautiful head tracking for your games.
No headset or extra equipment of any kind is required! Simply set up your device so that it can see your face. Using the on-screen controls, you can shift your perspective in-game.
It's an amazing experience to seamlessly move your head and have your game perspective play along.
Any game that supports the FreeTrack or TrackIR protocol will work with this, including Flight Simulator, Elite: Dangerous, FSX, IL2: Sturmovik, and many, many others!
If the octopus is moving, you are good to go!! Launch your game that supports TrackIR and it should work. Email support is provided if there are any issues.
Here is an example OpenTrack config that I find works pretty well for me with FS2020: Put this file into your Documents/opentrack-2.3 folder: default.ini