Imagine this:

First you see some spaceships. Then your mind becomes possessed: you see visions of Devil's Tower in Wyoming: you hear a weird mysterious 5-note melody: you travel to Devil's Tower with the hope of boarding the Mother Ship and flying from Earth with its crew. You arrive at Devil's Tower only to discover that others have come for the same purpose. You learn that only one of you will be allowed to board. To board the Mother Ship, you must compete against the others in a game, and win.

The object is to be the first to "sound" all five notes of the mystery tune by placing each of your five chips onto the board.