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