Example 1: unity clamp rotation float rotationX = 0 ; float rotationY = 0 ; // you might also have some rotation speed variable void Update ( ) { rotationX += Input . GetAxis ( "Vertical" ) * Time . deltaTime ; rotationX = Mathf . Clamp ( rotationX , minRotationX , maxRotationX ) ; rotationY += Input . GetAxis ( "Horizontal" * Time . deltaTime ; transform . rotation = Quaternion . Euler ( rotationX , rotationY , 0 ) ; } Example 2: how to clamp transform.rotation headRotation = Input . GetAxis ( "Mouse Y" ) * speed ; transform . Rotate ( 0 , 0 , - headRotation , Space . Self ) ; transform . eulerAngles . y = Mathf . Clamp ( transform . eulerAngles . y , - 90 , 90 ) ; Example 3: how to chagne rotation in unity transform . eulerAngles = new Vector3 ( 0f , 180f , 0f ) ; // rotates 180 degrees