The game starts with the story about a player-named male character whose father has just moved into the town of Midheart to work at NeoBrain, a robo research company.

The protagonist's team boards a ship headed for Encephalon Isle, where the Robo Cup is to take place.

Liv and the protagonist's father go missing half-way in as the security Robos take out commanders in the tournament.

A NeoBrain employee reveals himself as Scythe, leader of the Greybaum Syndicate, an international terrorist organization that intends to use Robo technology to control the world.

Upon infiltrating the nearby Research Facility, it is learned that the President ultimately regrets his decision, and he helps the protagonist.

Hadron revitalizes itself with Scythe's energy, gaining his personality and dreams, then defeats the protagonist in a robo battle.

The haywire security Robos disengage, and the organization behind the disruption is shut down, but NeoBrain is left in pieces due to this event.

In the epilogue, the protagonist learns that Lambda Inc., teaming up with NeoBrain, has offered to host the Robo Cup again, but this time with "no strings attached".

Battles begin with the protagonist's custom robo cube being launched out of a "Robo-Cannon" (controlled with the D-pad).

The objective of the battle is to reduce the opponent's energy points from 1000 to 0 by using the protagonist's guns, bombs, pods, and dash attacks.

[5] Ray Mk III appeared as an Assist Trophy in the Wii video game Super Smash Bros.

[citation needed] Ray Mk III also appears as a Spirit and a Mii Fighter Costume in Super Smash Bros.