Nightmare Animatronics are fictional characters from the popular video game series Five Nights at Freddy's. They are designed to be frightening versions of the original animatronics, featuring darker colors, sharp teeth, and unsettling features. These characters are often associated with nightmares and are known for their aggressive behavior towards players. In the game, players must survive against these animatronics by monitoring security cameras and managing limited resources. The Nightmare Animatronics add an element of horror and challenge, making the gameplay experience intense and suspenseful. Their eerie designs and unpredictable movements contribute to the overall atmosphere of fear in the series.