“History is written by the victors. They will remembered forever as long as they are in history. But, what if the history is full? You can’t write anymore history. The solution is simple. Delete other history, and make them forgotten as if they never existed.”
Step Rumble is a game about a battle to maintain the existence of great things that has written on history. The battle occurs because the history is full. They must win to survive. But, if they lose, their existence will cease to exist and forgotten.