In the year 2025 Tokyo changed.
Due to air pollution, all the people moved to New Tokyo and the Old Tokyo got deserted. Now it's used for a sport called Rumbling, which is a brutal, action filled sport and the stars are customised mecha-like machines which battle against each other in arenas made exclusively for the sport. Little by little, the sport got a foothold and now is one of the most successful things in entertainment.
There is a story mode, which sees the player fight her way through the ranks of opponents, each one a bit harder than previous. She must use the credits won from the battles to soup up the mech with different parts and weapons. One can also choose the coloring of her mech which adds to the uniquity of each fighting machine.
Missiles fly and explosions shatter the ground as these huge metal monsters take on each other both outside and inside buildings, and also the time of day changes so the battle could take place during the day or night. Once in a while, player has to battle a boss and earn some sweet rare parts if it is defeated.
There is also multiplayer with 2-4 players fighting in split-screen mode.