Someone forgot about Fallout Tactics. But yeah, that's from 2 where he has the cape. That's the Laser Rifle model from 2 as well, bethesda changed it all up.

no i'm pretty sure you can get a deathclaw pet in FO76

funny enough, im pretty sure this is actually fallout 2 and thats mah boi, Goris, holding the umbrella. Hes the only deathclaw companion in the franchise.