Table I shows the evaluation setting with demographic information. We used a mixed-method questionnaire (in Korean) that included open-ended and multiple choice questions with Likert scale (5 = strongly agree, 1 = strongly disagree). Pre-test part of the questionnaire collected participant's background information about feelings toward sport and games. Post-test part of the questionnaire measured participant's perceptions on motivation, usability, game activities and game's appropriateness. In this evaluation we only analyzed statements related to usability. Evaluation started by researchers explaining the game concept and how to defuse bombs after which the players filled in the pre-test questionnaire. In the first prototype evaluations, the players were divided into two teams and they were given 20 minutes to play in university campus. In Unity version evaluation the players played individually for 5 minutes inside a university building. Researchers observed and took notes on gameplay. After playing game, players filled in the post-test questionnaire