| Achievement | How to unlock
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|---|
| A BABY'S DUTY (25 points) | Win all Cups in easy mode.
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| A BABY'S GOTTA DO WHAT A BABY'S GOTTA DO (25 points) | Use boost for the first time.
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| ALL-STAR TEAM (25 points) | Win with all racers.
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| ANCHORS AWEIGH (25 points) | Win a Cup in easy mode.
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| BABY THROTTLE (25 points) | Win your first race.
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| BOUND FOR GLORY (25 points) | Win all Cups in Normal mode.
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| CHAMP (50 points) | Win 9 victory laps.
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| DAS SUBWAY (50 points) | Find a shortcut.
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| DASH AND DESTROY (25 points) | Break 5 objects in a single race using boost.
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| EYES ON ME (25 points) | Win a victory lap.
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| GETTING GOOD AT THIS (50 points) | Win a Cup in Expert mode.
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| GOING STRONG (25 points) | Win a Cup in Normal mode.
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| HEAVYWEIGHT CHAMPION (50 points) | Compete 10 times in each Arena mode.
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| I'M SO GOOD (25 points) | Win at the last second in Grand Prix Mode.
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| JACK OF ALL TRADES (25 points) | Play as each racer at least once.
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| MAKE PAPA STU PROUD (25 points) | Modify your kart for the first time.
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| MOGUL (200 points) | Unlock every upgrade in the store.
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| POWERFUL (25 points) | Use custom power ups for all the racers.
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| SLIME ATTACK (25 points) | Take down at least 3 opponents in a single race.
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| SLIME MY RIDE (25 points) | Use a custom power up for the first time.
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| SLIME RIDER (50 points) | Put in the miles on the jetski.
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| SLIME-MANIA (25 points) | Activate the Slime in all the locations.
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| SLIMED! (25 points) | Activate the Slime valve for the first time.
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| STOOP KID (25 points) | Beat your record for first time.
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| THE BEST AROUND (50 points) | Win all Cups in Expert mode.
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| TURTLE BROTHERHOOD (25 points) | Co-operative special attack for the first time.
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| WARRIOR (25 points) | Compete in the Arena for the first time.
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