|Damage dealt||1-6 HP|
|First Cave • Egg Corridor • Bushlands • Labyrinth • Waterway • Last Cave • Black Space|
Critters (クリッター Kurittā) are recurring enemies in Cave Story, making frequent appearances in various locations throughout the game. They are also one of the first enemies to be encountered when the player starts a new game.
Critters seem to have a gelatinous appearance, with a round, uneven shape. They possess white round ear tufts. They have a small indent that separates their bottom part into two halves. Two eyes are prevalent at the top of their face area as vertical black lines. A short horizontal black line forms an implied mouth or nose below the eyes.
Critters are colored according to the location they are in. This indicates their attacks, as well as the amount of damage dealt to Quote.
Critters appear to be at rest when Quote is quite a distance away from them. They are sometimes hidden behind signs or partly into the ground; such is the case with aqua critters in the Egg Corridor or Power Critters in Bushlands. In some cases, critters may notice Quote when he is directly below them, and will start to hop in his direction.
Contact with a critter will cause Quote to lose some health, and may also move him in an upwards direction. This may be used by players as a way of boosting Quote up a ledge unreachable by jumping, like the passageway to reaching the Arms Barrier in the Labyrinth.
A critter's attack depends on its type, denoted by colour and location. Most critters, when approached, move by hopping in smaller increments towards Quote. Others may be capable of shooting bullets or flying longer distances.
Below are the types of critters encountered in Cave Story.
|Color||Sprite||Location||Health (HP)||Behaviour when approached||Damage dealt|
|Blue||First Cave||2||Hops in small increments towards Quote.||1|
|Green||Bushlands, Waterway||4||Propels in the air, following Quote, tries to land on him.||3 (landing), 2 (contact)|
|Aqua||Egg Corridor, Egg Corridor?, Drafty Cave||4||Hops in small increments towards Quote, often hides behind objects.||5|
|Purple||Labyrinth, Bottom of the Island||10||Flies in the air for a brief period of time, firing bullets in Quote's general direction.||3 (landing), 8 (hovering), 5 (bullets), 2 (contact)|
|Red||Last Cave, Last Cave (Hidden)||6||Hops in small increments towards Quote.||6|
|Orange||Black Space||2||Hops towards Quote higher than other critters, fall off-screen after a few hops, spawned in hordes by Possessed Misery.||2|
|Brown||Wind Fortress||5||Leap and propel themselves towards Quote.||3 (landing), 2 (contact)|
|First Cave • Polar Star • Spur • Quote • Tetsuzou Kamadani • Critter • Bat • The Door|
|General||Egg Corridor (Egg Corridor?) • Missile Launcher • Sky Dragon • ID Card|
|Characters||Sue Sakamoto • Robots • Cthulhu|
|Enemies||Critter • Beetle • Behemoth • Basu • Basil • Time Bomb • Dragon Zombie|
|Bosses||Igor • Sisters|
|General||Labyrinth • Blocks • Team 9|
|Characters||Chaba • Dr. Gero • Nurse Hasumi|
|Enemies||Critter • Gaudi • Armor • Gaudi Egg • Fire Whirrr • Buyobuyo Base • Buyobuyo • Fuzz • Fuzz Core|
|Bosses||Monster X • Puu Black • Balrog • Core|
|Items/Weapons||Snake • Turbocharge • Whimsical Star • Arms Barrier • Cure-All • Super Missile Launcher • Booster v0.8 • Tow Rope • Curly's Air Tank|
|General||Waterway • Ironhead • Alien Medal|
|Enemies||Critter • Bat • Jelly • Porcupine Fish|
|Interactive objects||Water • Current • Spikes|
|General||Last Cave • Red Ogre • Medal of the Red Ogre|
|Enemies||Critter • Bat • Press|
|Hazards/Objects||Lava • Spikes • Experience capsule • Fans|
|Enemies and bosses|
|Enemies||Critter • Bat • Door • Egg Fish • Pignon • Gravekeeper • Beetle • Behemoth • Basu • Basil • Time Bomb • Dragon Zombie • Power Critter • Jelly • Kurara • Press • Mannan • Frog • Petit • Sandcroc • Skullhead • Skullstep • Skeleton • Crow • Armadillo • Polish • Flowercub • Gaudi • Armor • Gaudi Egg • Fire Whirl • Buyobuyo Base • Buyobuyo • Fuzz • Fuzz Core • Porcupine Fish • Hoppy • Night Ghost • Midorin • Droll • Gunfish • Orangebell • Stumpy • Ravil • Bute • Mesa • Rolling • Delete • Green Devil • Curly Clone|
|Bosses||Balrog • Igor • Balfrog • Curly Brace • Omega • Rabid Toroko • Puu Black • Monster X • Core • Ironhead • Sisters • Ma Pignon • Red Ogre • Misery • Doctor • Muscle Doctor • Undead Core (Possessed Sue • Possessed Misery) • Heavy Press • Ballos • G-CLONE|