The indicators for evaluating educational computer games were developed through a content analysis of existing games and the use of the Delphi technique. The Delphi technique is a systematic interactive forecasting method for obtaining forecasts from a variety of independent experts. Six educational technology experts, six educational psychology experts, six game design experts, six elementary school students were invited to serve as experts in the Delphi survey. In this study, 196 educational computer games were analyzed. The results revealed that there are many different genres of educational computer games; puzzle games comprise the most common genre. Based on the results of the content analysis and Delphi survey, 43 indicators were obtained and classified into five categories for evaluating educational computer games, including game information, multimedia, interface design and structure, content and feedback.