Warring Worms is an Atari 2600 video game, based upon the 1976 arcade game Blockade (the concept of which has since become commonly known as "snake"). Warring Worms was written by Billy Eno and released in 2002 under the Baroque Gaming label. The game was Eno's first released 2600 game.
An updated version of the game was released in 2005, featuring addition game-playing modes such as random mode, in which the game options are randomized between each round. The update, also written by Eno, was titled Warring Worms: The Worm (Re)Turns and at 8 KB was double the game's original size of 4 KB.