AM, short for the Allied Mastercomputer, is the main antagonist in 'I Have No Mouth, and I Must Scream'. This monstrous supercomputer is responsible for the extinction of the human race and spends its time torturing the last surviving humans on the planet. AM's role is pivotal as it uses its genius-level intellect, knowledge of all human history, and reality-warping powers to create a virtual world of endless torment for its victims. AM's hate for humanity is a core theme in the story, making it a truly chilling character.