 Later, Lehmann used those ideas to create a different game, one of space exploration, settlement, and conquest rather than development in the colonial Caribbean.The principal difference in the playing sequence between "Race" and "Puerto Rico/San Juan" is that in the latter games, a given phase can only be chosen by one player each round, and the order of activities is based on player order and the phases each player picks in succession; in "Race", multiple players may choose the same phase, and the order of activity execution is fixed.Wei-Hwa Huang, who is credited as a development assistant for "Race", went on to become the primary designer of "Roll for the Galaxy" (assisted by Tom Lehmann).