Answer by cjdev

As FortisVenaliter said, this isn't a case of Gimbal Lock but of local vs world coordinate systems. Still, I'd recommend using Quaternions anyways because it's a good habit to get into. In this case it might look something like this: transform.rotation *= Quaternion.Euler(0, 0, 90f * value); Note that multiplying Quaternions is adding their rotations.