Philip K. Dick: Fallout

It's the 2010s and nuclear war between the US and the Soviet Union has forced humanity into bunkers, scorching the planet and leaving only the Leadys, the semi-sentient robot fighters, to continue to wage the war above against other Leadys.

The humans below, however, think that their Leadys might have other motives...

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Adapted from "The Defenders" by Philip K. Dick.