Guides

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    • Overachiever

    Fastest way that this can be achieved is by playing 1 GP on normal difficulty (as 1 upgrade wants you to win a GP) and you can knock out the "Non Time Trial" ones there aswell which is Drift 5 seconds and boost 10 times.

    Rest is all doable in Time Trial and the map ive that seems to work the best is
    Desert → 8 Ball highway