I've settled on using the I2C Device Library for my headtracking project. The sensor data is far more stable than any other solution I've tried.
I've uploaded a minimal demonstration project to Github.
https://github.com/Temetra/GY521StarterKit
The next step is to hook the output up to a virtual joystick and try it in some games. ATS should be easy, I'm less confident about NMS.
GitHub - Temetra/GY521StarterKit: A project bundle demonstrating how to use an MPU-6050 accelerometer and gyroscope sensor.
A project bundle demonstrating how to use an MPU-6050 accelerometer and gyroscope sensor. - GitHub - Temetra/GY521StarterKit: A project bundle demonstrating how to use an MPU-6050 accelerometer and...