The Stalker is a Zed that will cause anybody that isn't a Commando much grief. Why? Simply because it tends to spend most of its lifespan invisible. It tends to spawn in any place where it can get the drop on you. It starts to appear on the second wave, and will show up during the boss wave.

The Stalker will move towards a player based on proximity while staying cloaked. When it reaches its target, it will uncloak and perform an attack. Once it has finished attacking, it will cloak again. If it has been shot in the head by a non-fatal headshot, it will be unable to cloak. It will commonly spawn in manholes, vents and windows. On higher difficulties, they will use acrobatic moves to dodge player attacks. On Hard they gain a chance to sprint when damaged, and on Suicidal, they gain a chance to sprint randomly. On Suicidal their chance to sprint when damaged will be higher, and on Hell on Earth, they will have a very high chance to sprint randomly, and will always sprint when damaged. It will sprint automatically when five Zeds are left in the current wave. These conditions only occur when she is within 6-12 meters of the player (600-1200 units). It will fight other Zeds that attack it, but will die quickly due to its low health.

Players should listen for wind-like echos as to keep themselves from being surprised by a group of Stalkers. If they can not hear one, they should watch for any abnormal outlines in the area, which will let them know of a Stalker's presence. A Stalker's cloak will occasionally flicker, which should give away their position to a player with a good eye. Stalkers that take any form of damage that doesn't kill it will temporarily decloak. Having a Commando on a team is valuable, as they have the ability to see cloaked Stalkers. They should attempt to focus fire on any Stalkers to prevent their team from taking damage. If they have the Callout perk skill, their whole team will be able to see any Stalker they can see. Commandos should use this perk skill if Stalkers are an issue for the team. Shooting a Stalker in the head will remove its ability to cloak if it is not outright killed, which can be used to conserve ammo and reveal cloaked Stalkers to teammates.

Zed damage is multiplied based on difficulty.








Zed speed is multiplied based on difficulty.








Doors have 4000 total health. Their max welded health is 1500. When either of these two types of health reaches 0 the door will break and will not come back. Welded health can be repaired, the total door health cannot.

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