A Surface Seeker was one of the first machines to be a part of the Human-Machine War. They were eventually discontinued.
A Surface Seeker searches for any human intruders from Zion and destroys them. They are similar in appearance to the more fearsome sentinels, with claws and tenticles. Like the Sentinels, they hover above the ground.
The Surface Seekers may have been the predecessors to the Sentinels.