The Spur (シュプール Shupūru) is the finished version of the Polar Star. It deals one of the highest amounts of damage with a single shot in Cave Story. The weapon can only be obtained by giving the Polar Star to Tetsuzou Kamadani when Quote returns to Mimiga Village from the Waterway.
The Spur was the gun that the Hermit Gunsmith was originally trying to create, but Quote took the unfinished Polar Star from him while he was asleep.
The Spur can be "obtained" back at the Hermit Gunsmith's abode in the First Cave after Quote returns from the Waterway. When the player talks to the gunsmith, he observes the Polar Star is missing and takes it away upon discovering that Quote is carrying it. The gunsmith suddenly feels moved by the evidence of use with the gun, even before its completion. He apologises to Quote and allows him to keep the gun, after finishing the work on the weapon, which causes the Polar Star to become the Spur.
Unlike other weapons in the game, the Spur has its own charging function, making the weapon immune to damage level-down. Holding down the attack button will charge up the Spur's energy and increase its firepower with each level of charge. Its level 1 form bullet does the same amount of damage as the level 3 Polar Star bullet. Fourteen bullets from the Spur can be onscreen at a time.
It is possible to "upgrade" the Spur by collecting XP. Overtime, if the player collects a total of 300 XP with the Spur, they can perform an instant shot.
|Level||Behaviour||Maximum bullets||(HP)||XP to level up/MAX|
|1||Bullets look similar to that of the Polar Star level 3 form||1||4||40|
|2||A single laser stream||1||Up to 98||60|
|3||Twin stream of lasers||1||Up to 244||200|
|Max.||Thick laser beam||1||Up to 474||N/A|
- If the player returns to the Labyrinth Shop after obtaining the Spur, Chaba gives Quote the Whimsical Star, calling it a "trinket".
- After obtaining the Spur, the enemy placement of the First Cave changes. Multiple bats and critters cover most of the ground that were not there before, probably for the player to test the Spur. However, the level 3 Blade seems to be the most efficient at killing these.
|First Cave • Polar Star • Spur • Quote • Tetsuzou Kamadani • Critter • Bat • The Door|
|Weapons||Polar Star • Missile Launcher • Fireball • Bubbline • Machine Gun • Blade • Snake • Super Missile Launcher • Spur • Nemesis|
|Items||Map System • Silver Locket • Arthur's Key • ID Card • Santa's Key • Chako's Rouge • Jellyfish Juice • Charcoal • Rusty Key • Gum Key • Gum Base • Bomb • Curly's Panties • Puppies • Life Pot • Turbocharge • Clinic Key • Arms Barrier • Cure-All • Booster (v0.8 • v2.0) • Tow Rope • Curly's Air Tank • Medals (Alien Medal • Medal of the Red Ogre) • Whimsical Star • 290 Counter • Teleporter Room Key • Sue's Letter • Mimiga Mask • Sprinklers • Controller • Mushroom Badge • Ma Pignon • Little Man • Iron Bond • Beast Fang • Prinny Cap|