Fallout: New Vegas Creatures

Humanoid

 * Ghouls
 * Humans
 * Super mutants

Non-humanoid

 * Bighorner
 * Brahmin
 * Centaur
 * Evolved centaur
 * Coyote
 * Dog
 * Cyberdog
 * Legion mongrel
 * Giant rat
 * Mole rat
 * Wolf

Reptiles

 * Deathclaw
 * Deathclaw baby
 * Young deathclaw
 * Blind deathclaw
 * Deathclaw alpha
 * Deathclaw alpha male
 * Deathclaw mother
 * Legendary deathclaw
 * Gecko
 * Fire gecko
 * Golden gecko
 * Little gecko
 * Mirelurk king
 * Lakelurk

Creature-like plants

 * Spore plant
 * Spore carrier

Unknown

 * Nightstalkers

Arthopods

 * Cazador
 * Bloatfly
 * Giant ant
 * Mantis
 * Radscorpions