Shadow

The Shadow is an enemy type which is only visible in light, or with the Bio Tracker tool. It made its debut in Rundown 1 during GTFO's Early Access, on the D1 map called "Deeper".

Appearance
The Shadow enemies are built like regular Strikers, with one major difference: they are completely invisible in the dark. When a light source is shined upon them, they are reminiscent of walking shadows, with see-through bodies and somewhat blurred outlines. They have a larger counterpart found deep within the complex.

The Shadow enemies can spawn during horde sequences and in a sleeping state. As of Rundown 4 Shadows can only be found in C, D and E tier expeditions.

Behavior
The players need to use either a semi-strong light source, or their Bio Tracker, to make them visible. They make an easily recognizable, high pitch scream sound while charging towards the players, and use the same attacks as regular Strikers when they get close.

Long Range Flashlight
A Long Range Flashlight will cast a clear silhouette of the Shadow from a distance. Either switch between your weapons and the Long Range Flashlight or cooperate with a teammate.

Bio Tracker (Recommended)
A Bio Tracker will mark Shadows with a red triangle like any other enemy during combat, however the scan only lasts for a few seconds, unlike scans on other enemies. A marked Shadow will be targeted by Sentries, while unmarked Shadows are not seen (therefore not targeted).

C-Foam
Large amounts of C-Foam from C-Foam Grenades and C-Foam Launcher have moderate effectiveness in combination with a Long Range Flashlight. C-Foam will halt, hopefully, most of a wave and encase Shadows while a Long Range Flashlight can illuminate the rest.