In the GBA version the Challenges are Battle, where the player destroys opponents and Tag, where the player rams opponents. Along the way, new vehicles, as well as new race/battle maps and weapons, are unlocked. Each challenge comes with various tasks, such as achieving 'x' Stunt points, collecting 'x' gears, or reaching the finish before the clock hits 00:00. In the Challenge mode, the player has to complete all 18 challenges. In the GBA version, the story mode is simply races mixed with tasks given by the Professor such as destroying other vehicles and collecting items. The game's missions take place across 5 different locations, with three missions in each world, except for the final world, which only has 2 missions. These tasks vary from destroying a few vehicles, collecting items, racing/battling a boss, and more. In the main Adventure mode, the player has to beat all 14 missions, while completing tasks in each one. Peter Justice's former associate on the Hot Wheels engineering team), who’s trying to get both the prototype car and Velocity X so he can go back in time and destroy the Justice family and thereby prevent any and all Hot Wheels cars from ever existing. He is confronted with various 'villains' on his quest, such as Conrad 'Nitro' Byrne, Billy Bob 'Backroads' Belcher, Fast Lane Friscatti, Simon 'Slick' Deluca and Rupert Jacoby, all of whom work for the main antagonist of the game, Otto Von Diesel (Dr. Peter's 17 year old son, Maxwell 'Max' Justice (voiced by David Kaufman), insists on his dad's robot 'Gearhead' that he should try to track down whoever stole the cars and attempt to retrieve them all (in the GBA version, however, the robot, 'Gearhead' is the playable character).

Peter Justice, is robbed and bombed the most vital items that were stolen being some computer disks on the formula Velocity X (a formula for a racing super fuel that allows cars to travel twice their normal speed) and a prototype Hot Wheels car (that runs on uranium and can turn invisible for short periods of time). The story begins when The Hot Wheels car business, owned by Dr.

Hot wheels velocity x pc set resolution