Humans will never forget that day - when a grotesque substance appeared in the sky suddenly, followed by a collective mutation of mankind with no warning. Within an instant, zombies had engulfed every corner of the world! Survivors formed various resistance groups to combat the zombies. In the spur of the moment, a mysterious girl in sailor uniform reappeared. What secrets lie behind her? What caused this sudden mutation? No time for questions, join the battle for the world! Unleash Your Power: • Master the utilization of random skills that appear during the midst of battle. • Collect disks of incredible power to release devastation upon the zombies. • Arm yourself with a wide arsenal of weapons and gear, each with their own unique features and abilities. • Take on daunting bosses and conquer new challenges in each level. • Use the power of science to enhance your abilities and become even stronger. Join the fight and show these zombies what you're made of, and save the worl...