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Evacuation drills should be more realistic and interactive. Focusing on situational and audio-visual realities and scenario-based interactivity, the authors have developed a game-based evacuation drill (GBED) system that presents augmented reality (AR) materials on tablet computers. The paper's current research purpose is to improve visual reality (AR materials) in our GBED system.

The author's approach is to develop a new GBED system that superimposes digital objects [e.g. three-dimensional computer graphics (3DCG) elements] onto real-time vision using a marker-based AR library, a binocular opaque head-mounted display (HMD) and other current easily available technologies.

The findings from a trial experiment are that the new GBED system can improve visual reality and is appropriate for disaster education. However, a few problems remain for practical use.

When using the GBED system, participants (i.e. HMD wearers) can suffer from 3D sickness and have difficulty in moving. These are important safety problems in HMD-based systems.

The combination of AR and HMDs for GBEDs (i.e. integrating virtual and real worlds) will raise questions about its merits (pros and cons).

The originality of the research is the combination of AR and an HMD to a GBED, which has previously been realized primarily as simulation games in virtual worlds. The authors believe that our research has the potential to expand disaster education.

Traditional evacuation drill is monotonous. Therefore, evacuation drill should be diversified to get more people interested in disaster prevention. Our idea is game-based evacuation drill using real world edutainment (RWE). This paper aims at clarifying how RWE-based evacuation drill is realized.

RWE provides experiential learning as the integration of edutainment and the real world. An RWE system works on a tablet PC and presents digital contents associated with learning scenes (e.g. real world locations) according to a branched storyline.

Story (branched storyline), indirect/direct competition, and augmented reality content provide multi-ending and flexible instructional support and are helpful for diversifying evacuation drill.

RWE-based evacuation drill could be accepted by more people, but a branched storyline should be carefully refined to achieve maximum effect.

RWE-based evacuation drill could open up diversification of disaster prevention education.

The originality of this study is to integrate edutainment, the real world, and evacuation drill. In the long run, this study could be helpful to save lives when a natural catastrophe (e.g. large earthquake) occurs.