Citadel City is the fourth and final hub world before the final confrontation with Nitros Oxide. This area features futuristic tracks with challenging layouts, anti-gravity sections, and often more aggressive AI opponents. To unlock the boss, Pinstripe Potoroo, you'll need to collect all four Trophies from the races within this hub.
The tracks here demand mastery of all previous techniques, including consistent power sliding, air control, and strategic item usage. Expect faster opponents and more complex track designs. This is where your skills will be truly tested.