January 2011: "Don Rawitsch rolled out a four-foot-long piece of white butcher paper on the living room floor of his Crystal apartment. He glanced at an open map of the United States frontier from the 1800s. Then he traced a squiggly line from the right side of the paper to the left.

By the time his roommates Bill Heinemann and Paul Dillenberger returned home, the line had become a series of squares leading across a map of the western U.S. Rawitsch was scratching out words on a stack of cards. 'Broken wagon wheel,' said one. 'Snakebite,' said another.

He called it 'Oregon Trail.'"