The Overkill skillshot is achieved by using a Charge Shot from the PMC to get a headshot. This can be somewhat difficult because the Charge Shot causes the weapon to shake, making precise aiming more challenging.
One easy way to get this, is to charge up your PMC, leash an enemy towards you, and shoot him in the head while he is airborne.
- Overkill is a common term in gaming. It is used to describe an exaggerated amount of force or power used to kill an enemy. In this case the Charge Shot is enough to instantly kill a standard enemy with a hit anywhere on the body, and a headshot with any weapon is fatal; so, an excessive amount of power is being used for a regular kill.