Cameos and References
This is a list of games and other media that have referenced Cave Story in some way or form. This page is still a work in progress and is by no means exhaustive.
Blade Strangers
Quote and Curly Brace are both playable characters in Blade Strangers.1001 Spikes
Curly can be unlocked as a playable character in 1001 Spikes by obtaining 30 golden skulls. She is equipped with a Booster 2.0 and her trademark machine gun.Castle in the Darkness
A statue of Balrog can be found in a room behind that ledge to the right of the fire bomb enemy in the Clock Tower. You will need the Wing Boots to reach it.Creepy Castle
Balrog can be found in Scenario 4 (Due Exaltation) within the Great Machine in a room accessible with the Lasso and the Jump Boots from Florius.Enter the Gungeon
The Polaris, a reference to the Polar Star, can be unlocked by completing the Hollow 20 times.Terraria
The robot hat has a 0.4% chance to drop from Piranhas or Angler Fish in Terraria. It is a reference to the hat worn by Quote in Cave Story.Cat Poke
Paintings of Quote and Curly can be found on the second floor if you can be distracted long enough from trying to poke cats.BIT.TRIP Runner 2
Quote is available as a playable character in the Good Friends Character Pack for BIT.TRIP Runner 2.Kid Icarus: Uprising
"Remember, Pit, you won't be fighting alone out there.""You're going to send me a machine-gun-robot girlfriend?"
From the opening lines of the Powers tutorial.