The Creeper costume is a set of vanity items consisting of the Creeper Mask, Creeper Shirt, and Creeper Pants. Its male and female variants look identical. It has a chance to drop from Goodie Bags during Halloween.
- The Creeper is a hostile mob from the sandbox video game Minecraft and is considered one of the game's signature elements.
- Re-Logic was given permission by Markus "Notch" Persson, the creator of Minecraft, to add the Creeper Costume to Terraria.
- The Creeper costume is the only set of clothing to have more than two visible legs, in keeping with the Creeper's quadrupedal shape in Minecraft.
- The creeper costume includes arms, something that Minecraft creepers lack.