SCP-6410 "Headcrabs"

Lamarr, a tamed instance of SCP-6410-1, outdoors.

## **Special Containment Procedures:**

SCP-6410-1 instances are to be contained individually in standard humanoid containment cells at Site-██. Cells must be equipped with reinforced walls, airtight doors, and reinforced viewing windows. Instances of SCP-6410-2 are to be terminated upon discovery to prevent further spread of the infection.

## **Description:**

SCP-6410 refers to a pair of closely related anomalous entities designated SCP-6410-1 and SCP-6410-2. SCP-6410-1 instances are small, parasitic creatures resembling crustaceans, colloquially referred to as "Headcrabs" due to their unique anatomical structure. These organisms possess a set of legs and a powerful muscular tail, which they use to launch themselves at potential hosts.

When SCP-6410-1 makes contact with a suitable host, it attaches itself to the cranium of the victim using a set of appendages located on its underside. The host undergoes a rapid transformation process, during which SCP-6410-1 takes control of the host's central nervous system. The victim remains conscious throughout this transformation, exhibiting extreme distress and vocalizing their suffering. It has been observed that these vocalizations are reversed when recorded and played back, indicating a distortion in the perception of time by the affected individuals.

Once the transformation is complete, the host becomes SCP-6410-2, commonly referred to as a "Zombie." SCP-6410-2 instances exhibit aggressive behavior towards uninfected individuals and display diminished cognitive function. SCP-6410-2 instances lack higher brain functions and operate primarily on a basic instinctual level.

SCP-6410-1 instances exhibit an omnivorous diet, capable of consuming both animal and plant matter. They have been observed feeding on small rodents as well as fruits, such as watermelons. Additionally, it has been noted that SCP-6410-1 instances have the ability to grow and develop into larger forms known as "Gonarchs," similar to those observed in the events following the Black Mesa incident (see Incident Report 6410-███).

## **Addendum 6410-1: Incident Report 6410-███**

During containment breach event ██/██/20██, Dr. Isaac Kleiner, a former employee of the Black Mesa Research Facility, managed to capture and contain a single instance of SCP-6410-1. The Headcrab, designated SCP-6410-1-L, was subsequently "debeaked" to prevent further instances of SCP-6410-2 from being created. SCP-6410-1-L, nicknamed "Lamarr," has been successfully tamed and resides with Dr. Kleiner in his private quarters at Site-██. It is to be noted that this arrangement is under the authorization and supervision of the Site Director.

## **Addendum 6410-2: Interaction with Other SCP Entities**

SCP-6410-1 instances have been observed to be hunted by SCP-6746, a species of aquatic anomalous creature commonly referred to as "Bullsquids." The nature of this interaction is currently under investigation.

## **Addendum 6410-3: Dr. Kleiner's Knowledge**

Dr. Isaac Kleiner, due to his past involvement with the Black Mesa Research Facility and expertise in xenobiology, possesses knowledge regarding the origin of SCP-6410-1 instances. It is theorized that these organisms originate from a distant planet known as Xen, a location frequently referenced in Dr. Kleiner's reports. Investigation into the connection between SCP-6410-1 and the events of the Black Mesa incident is ongoing.

Further research and containment protocols for SCP-6410 are currently underway, with the aim of better understanding the anomalous properties exhibited by SCP-6410-1 and SCP-6410-2.