Deathclaw

Originally engineered from scientific experiments conducted by the United States government to develop a cheap, cost-effective replacement for human troops during heavy-duty combat operations, the creature which came to be called the "deathclaw" was the result of a genetic mishmash of various animal species, with the primary test subject being Jackson's chameleons.[1] Although the project was successful in creating a ferocious predator capable of surviving and thriving on its own in nearly any environment, to date there has been no official sources confirming that the government carried out their original goal of deploying the deathclaws into military combat prior to 2077.

Deathclaws are a large, carnivorous,[9] bipedal reptile species, designed for maximum lethality. The choice to make them bipedal was natural, as bipedalism raises the head, providing a greater field of vision and thus improving the ability to detect targets or resources. The upper limbs were also freed by this choice and could be fashioned into extremely dangerous weapons. The caveat is that the deathclaw is not as fast as a quadrupedal animal, though this is a largely academic concern. However, deathclaws have been observed running on all fours when charging prey. The rippling musculature of the deathclaw provides it with superior strength, excellent speed, and incredible resilience in most combat situations.[10][Non-game 1][1] Deathclaws communicate with each other in a pack using growls and body language, though they are also capable of mimicking human voices like a parrot if their intelligence is artificially increased.[1]

Deathclaws are pack animals, with the leadership role assumed by the alpha pair, the strongest male and female deathclaws in the group. The remainder of the pack follows the leaders and migrates along with them.