In the Fallout universe, robots had been constructed for many purposes, and many examples survived long enough to be a factor post-War. Fallout Wiki.
I think I broke the record doing these last week. 12 miniatures painted in two days. I know the colour scheme is simple, but yet... try this in 28 millimeter! Models are from the scene.uk and Alternative Armies. Robo-Brain, Protectron, Mr. Gutsy and Securitron are ready to roam the wastes.
Stay safe, stay healthy.