Overkill

Overview

 * Adds the leftover damage of a weakspot kill onto your next weakspot hit.
 * Unlocks at rank 37 for players with The Last Stand DLC.

Trivia
This perk's name might be a reference to OVERKILL Software, another game company which Coffee Stain Studios has an apparent partnership.

Notes & tactics

 * Overkill stacks indefinitely and carries into subsequent waves, potentially allowing one-hit-kills of many enemies.
 * Static Discharge and Headache become quite powerful if combined with Overkill, since their damage is percentage based.
 * Snorkers present an ideal situation for racking-up large amounts of overkill damage in a relatively short period, as they have low health, prominent weakspots, and usually spawn in larger groups.
 * It tends to shine more in Single Player mode than in coop, since in multiplayer enemies will also be killed by the partners, the chances of this being bigger if players are more. Additionally, the bigger health of enemies in coop makes for an increased likelihood of towers killing the lumes instead of the perk holder.
 * Though Overkill can be very potent in a normal Campaign, the leftover damage decreases significantly if enemy health increases, making it less effective in Survival, in coop and vs heavily mutated enemies.