Deathclaw (Fallout 2)

Deathclaws are creatures

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.