Abstract: A game apparatus simulating interplanetary space travel includes: a planar playing board having a first circuitous path of player movement around the periphery of the playing board and a plurality of player landing sites or areas therealong representing various charted and identifiable locations and events which may occur along the way, and a second circuitous inner, chance determined alternate path of player movement intersecting said first path at a plurality of spaced points and having a plurality of player landing sites therealong representing events which may occur in unexplored and often hostile locations; a segmented, multi-purpose, chance instructional dial with a conventional spinner device randomly determines player movement or events which occur along the first and second paths of travel according to printed indicia within the individual segments of the dial. Instructions for further spaceship movement or player action are printed on each of the aforementioned player landing sites.