The Game-Players of Titan [first edition]

This is the 1963 Ace Books paperback original, FIRST EDITION with Jack Gaughan cover art and cover code F-251. A classic Philip K. Dick novel, this one involves a depopulated, post-apocalyptic earth. The remaining humans play a board game called "Bluff," and the outcomes determine marrigages, status and property of the players. The Game is administered by amorphous, silicon-based aliens from Titan, Saturn's largest satellite.