After beating levels, new modes become available, such as the Relic Race, in which the player races through the track alone and completes three laps in the fastest time possible. "Time Crates" scattered throughout the level freeze the game timer when a player drives through them. If all of the Time Crates are destroyed, the player's final time is reduced by ten seconds. The player wins a Relic by beating the time indicated on the screen. Another mode, the CTR Challenge, is played like a normal race, except that the player must also collect the letters C, T and R scattered throughout the track. If the player manages to collect all three letters and come in first place, a "CTR Token" is awarded. These tokens come in five different colors: Red, Green, Blue, Yellow and Purple. The Purple CTR tokens are awarded for beating the Crystal Bonus Round by collecting 20 crystals under a certain time limit. If the player collects four tokens of the same color, the player will be able to access the Gem Cup of the corresponding color. Gem Cups are racing tournaments held against computer-controlled opponents and are accessible in a secret area in the "Gemstone Valley" world. A Gem Cup consists of four tracks in a row, in which the player must race for points. If one of these cups is won, a Gem is awarded. To win the game, the player must collect all trophies, Boss Keys, Relics, CTR Tokens and Gems before defeating Nitros Oxide in a one-on-one race.