This paper discusses the use of WebQuest, a World Wide Web-based multi-user game, in promoting learning motivation and navigation skills in K-9 students. WebQuest demonstrates ways to integrate games, Internet communication facilities, Web-based courseware, and database techniques together in order to assist learning. The following guidelines for designing the educational game script are discussed: selection of the style of the game; arranging the game script according to the learning hierarchy to prevent disorientation; and building a situated learning environment to promote learning motivation and to prevent disorientation. Results of an experiment in which eight classes used the game are presented; findings indicate improvement in all motivation factors (i.e., fantasy, cognition, curiosity, control, cooperation, competition, and challenge). Two figures illustrate the learning hierarchy and game structure, and querying the script structure and information of other players. Three tables present action statistics of students playing the game, a comparison of motivation factors, and a comparison of motivation factors between high and low achievement students. (DLS)