Reclaimer
A reclaimer is little more than a tripod of spindly legs supporting a laser tool, a camera, and a potent electromagnet.
Although no one knows exactly who created them, these ramshackle robots seem to be a rare example of robots created after the Final Wars, possibly even in the last forty to fifty years. They skitter across the landscape, searching for ruins, scrap metal and undefended robots. The reclaimers then start lasercutting the metal apart into small chunks that can be picked up by their electromagnet. They then drag their smoking prizes away to vast junkyards. Each “tribe” of 50 of so reclaimers has its own junkyard.
The reclaimers’ simple programming seems to consist of two orders: gather metal and make more of themselves. Each reclaimer builds a second reclaimer every month or so, given access to suitable supplies.
Reclaimers also possess a radio receiver, although what it's intended to receive from is unclear. Some have suggested that there is a signal that will command the reclaimers to bring all their salvaged parts to a particular location. Anyone who finds this location and sends the signal could find themselves presented with a massive pile of junk, spare parts, melted metal — and possibly a few Ancient artifacts.