The tet is an alien machine, responsible for the invasion of earth and the destruction of the moon.It is also the one who created the Jack Harper clones. It is situated above earth, and was destroyed by a nuclear explosion detonated by tech 49, who sacrificed his life to destroy it.It was mentioned as a " brilliant machine " and described that it " sucked our world dry ".It harvests any local resource it finds and converts them into pure energy. In the case of earth, it uses water. It dispatches drones hostile to humans except for techs.
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