The Euphoria Physics Engine was created by a middleware company called NaturalMotion.
NaturalMotion is a middleware company that sells software and consultancy to studios in order to speed up production or expand on what a project can do.
Euphoria Physics Engine uses models with an embedded skeletal, nervous, and muscular system in order to bring higher realism and immersion in games with high quality behavioral reactions to physical forces.
This video shows how Euphoria Physics is used to enhance the user experience in games like Star Wars: The Force Awakens