Centipede is a vertically oriented shoot 'em up arcade game produced by Atari, Inc. in 1980. The game was designed by Ed Logg and Dona Bailey. The player defends against centipedes, spiders, scorpions and fleas, completing a round after eliminating the centipede that winds down the playing field. The centipede starts at the top of the screen, traveling either left or right. When it hits a mushroom or the edge of the screen, it drops one level and switches direction. Thus, more mushrooms on the screen cause the centipede to descend more rapidly. The player can destroy mushrooms by shooting them, but each takes four hits to destroy. If the centipede reaches the bottom of the screen, it moves back and forth within the player area and one-segment "head" centipedes are periodically added. This continues until the player has eliminated both the original centipede and all heads. When all the centipede's segments are destroyed, a new centipede forms at the top of the screen. Every time a centipede is eliminated, however, the next one is one segment shorter and is accompanied by one additional, fast-moving "head" centipede.