Tokyo Shoumetsu Sensou

In the city of Tokyo, they were instructed to kill each other until 10,000,000 people have been eliminated from the city. This genocidal game, known as "Save the Earth," happens every four years. An over-populated city is randomly chosen to become the killing grounds for its denizens, and it's kill or be killed. They have no choice, and no escape. Akira Suwa must now fight to protect his loved ones and himself in this genocidal game.