Since conventional evacuation drills do not adequately simulate disaster situations, participants do not feel a sense of tension during evacuation. We developed a game based evacuation drill (GBED) system that focuses on situational and audio-visual realities and scenario-based interactivity. To improve the visual reality in a GBED, we adopt simple augmented reality (AR) and a binocular opaque head-mounted display (HMD). The simple AR represents vague extensive disaster situations (i.e., rain, fog, smoke and fire) by superimposing the overall disaster situations (dynamic three-dimensional computer graphics) onto the real-time vision captured by a stereo camera (attached to the HMD).