Deathclaw (Fallout 2)

Deathclaws are creatures

Gameplay attributes
The creatures are mutated Jackson's Chameleons. They are described as having sharp teeth, muscles, and claws. Deathclaws lay eggs, pairings decided by the pack leader. If the pack mother passes away, a new mate is chosen. There are several varieties of deathclaw, including those found in random encounters across the wasteland, often in groups of two to five and sometimes including young, tough, and baby deathclaws.

Intelligent Deathclaws
Intelligent Deathclaws occupying Vault 13 were created by the Enclave in an effort to create expendable soldiers. The creatures were injected with FEV by the Enclave, resulting in their increased intelligence. They realized they were destined for slavery, utilized by the Enclave for soldiers, and "played dumb" until they could gain their freedom. The Enclave realized the deathclaws had gained more intelligence than intended, and plan to exterminate the group. Goris, the son of the Vault 13 pack leader Gruthar, is a recruitable companion.

Appearances
Deathclaws appear in Fallout 2.

Behind the scenes
The Fallout Bible contains background information regarding the development of deathclaws.