This page contains Cave Story 3D Unlockables for 3DS called "Spur" and has been posted or updated on Mar 18, 2013 by JadyFralryVab. Let us know what you think of this Unlockable by thumbs voting.
Defeat the fish Boss. After appearing in the Reservoir, go to Arthur's house. Professor booster will appear from the teleporter and give you Booster 2.0. Note: Prior to this, do not talk to Booster in the Labyrinth. Use the Booster to reach to the first cave and talk to the hermit gunsmith. He will upgrade it to the Spur.
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