For any value of the damping coefficient γ less than the critical damping factor the mass will overshoot the zero point and oscillate about x=0. The behavior is shown for one-half and one-tenth of the critical damping factor. Also shown is an example of the overdamped case with twice the critical damping factor.
Note that these examples are for the same specific initial conditions, i.e., a release from rest at a position x0. For other initial conditions, the curves would look different, but the the behavior with time would still decay according to the damping factor.