Millipede (stylized as millipede in western releases and as Milli-Pede in Japan) is a 1982 fixed shooter video game developed and published by Atari, Inc. for arcades. It was released by Namco in Japan. It is the sequel to 1981's Centipede, with more gameplay variety and a wider array of insect enemies. The objective is to score as many points as possible by destroying all segments of a millipede that moves toward the bottom of the screen, as well as eliminating or avoiding other enemies. As with its predecessor, the game is played with a trackball and a single fire button which can be held down for rapid-fire.

Millipede was ported to the Atari 2600 and Atari 8-bit computers, and later to the Atari ST and Nintendo Entertainment System.

The player no longer takes the role of the "Bug Blaster" from Centipede, but instead takes the role of an elf called the "Archer". The object of the game is to destroy a millipede that advances downward from the top of the screen. The millipede travels horizontally until it either hits an obstacle or reaches the edge of the screen, after which it drops one row and reverses direction. Once it enters the player's gray maneuvering area, it stays there and extra heads appear at intervals until both they and the millipede are destroyed. Shooting a body segment splits the millipede in two, with the rear portion sprouting its own head. A collision with any enemy costs the player one life.

All flowers and poisoned or partially destroyed mushrooms revert to normal, whole mushrooms and score points during the process when the player loses a life.

At regular intervals, the player enters a bonus level with a swarm of enemies (bees, dragonflies, etc.) instead of the usual millipede. Each enemy awards increasing points, up to a maximum of 1,000 points per enemy. The attack ends when either the entire swarm has passed or the player loses a life. Also, at intervals new mushrooms will grow on the field while others disappear, in a pattern similar to Conway's Game of Life.

Players can choose whether to play at an advanced level, starting with a score that is a multiple of the number of points needed to earn an extra life (by default, 15,000). The gameplay is generally much more advanced than it would be had the player started with a score of 0 and worked their way up to that point level. The maximum advanced level allowed is a function of the preceding player's score, and games started at an advanced level where the player did not earn at least one extra life are not eligible for the high scoreboard.

Millipede was released for the Atari 2600 and Atari 8-bit computers in 1984, then the Atari ST in 1986. A version for the Family Computer was developed and published by HAL Laboratory in 1987 as Milli-Pede: Kyodai Konchū no Gyakushū. It was renamed to Millipede: Super Arcade Hit! for its 1988 US Nintendo Entertainment System release. In the Family Computer and NES versions, earwigs do not poison the mushrooms.

A port of the Atari 8-bit version to the Atari 5200 was completed in 1984 but not published.^{[citation needed]}