What's the last game humans will ever play? That was the challenge at the recent Game Design Conference. The winning board game, made of titanium and buried in the Nevada desert, is designed to last thousands of years. "I wanted to make a game that is not for right now, that I will never play," the designer said. He was inspired by architects of cathedrals that took hundreds of years to build. He's given out more than a million GPS coordinates to lead to the secret location where it's buried.