Prometan

The term "prometan" most commonly refers to a fictional species originating from the Halo video game franchise. Prometans are a highly advanced, insectoid race created by the Forerunners as a weapon against the Flood, another parasitic alien species. They are characterized by their biological nature, designed to assimilate and destroy any organic matter, particularly the Flood.

Prometans were deployed in massive numbers during the Forerunner-Flood war. Their primary function was to act as a biological weapon, consuming and disintegrating Flood forms. However, they were also incredibly dangerous and difficult to control, posing a threat to other life forms as well. Over time, the Prometans proved to be too destructive and unstable, leading to their containment and eventual abandonment by the Forerunners.

In the Halo lore, remnants of Prometan technology and biological material can still be found on various Forerunner installations. Their existence highlights the desperate measures taken by the Forerunners to combat the Flood and the ethical dilemmas associated with creating sentient or semi-sentient weapons. The Prometans serve as a significant element in the backstory of the Halo universe, illustrating the scale of the ancient conflict and the advanced, often dangerous, technologies employed.