Worms is a 2D artillery tactical video game developed by Team17 and released in 1995. It is the first game in the Worms series of video games. It is a turn-based game where a player controls a team of worms against other teams of worms that are controlled by a computer or human opponent. The aim is to use various weapons to kill the worms on the other teams and have the last surviving worm(s). Level designs are randomly generated based on seeds, with over 55,000 possible level creations.

Worms entered production in 1990 under the title Artillery. Andy Davidson, the game's main developer, overhauled his idea after seeing how Commodore's Amiga refined his ideas while introducing new ones. Lemmings (1991) served as one of the main inspirations for the game, as Davidson wanted Worms to deliver a similar quality of animation and humour. Davidson would also have trouble pitching the game to developers. Eventually, after showcasing the game at a 1994 ECTS, Davidson would meet with Team17's co-founder Martyn Brown who immediately offered to develop and publish the game.

The game first released in Europe for the Amiga on 17 November 1995, with many console ports releasing in the following years. Worms initially received a polarised reception; the gameplay was generally praised while its multiplayer and similarities to Lemmings and Cannon Fodder (1993) divided opinions. Across all ports, the game sold around 5 million units as of 2006. Despite its mixed reception at the time, the game has been retrospectively cited as one of the greatest video games ever made. It was included as a title in the 2010 book 1001 Video Games You Must Play Before You Die. Its commercial success also spawned a franchise, beginning with Worms 2 in 1997.

Worms is a turn-based artillery game, similar to other early games in the genre such as Scorched Earth. Each player controls a team of several worms. During the course of the game, players take turns selecting one of their worms. They then use whatever tools and weapons are available to attack and kill the opponents' worms, thereby winning the game. Worms may move around the terrain in a variety of ways, normally by walking and jumping but also by using particular tools such as the "Bungee" and "Ninja Rope", to move to otherwise inaccessible areas. Each turn is time-limited to ensure that players do not hold up the game with excessive thinking or moving. The time limit can be modified in some of the games in the Worms series.

Over twenty weapons and tools may be available each time a game is played, and differing selections of weapons and tools can be saved into a "scheme" for easy selection in future games. Other scheme settings allow options such as deployment of reinforcement crates, from which additional weapons can be obtained, and sudden death where the game is rushed to a conclusion after a time limit expires. Some settings provide for the inclusion of objects such as land mines and explosive barrels.

When most weapons are used, they cause explosions that deform the terrain, creating circular cavities. If a worm is hit with a weapon, they will lose health. A worm who is out of health will die by blowing themselves up and leaving a grave marker. Worms can also die by being thrown off the side of the map or by falling into the water at the map's base.

Worms was the brainchild of Andy Davidson, a then-unknown computer shop employee and fan of Amiga microcomputers since 1987. He began work on the project in 1990 under the name Artillery, based on previous tank games from the 8-bit era using a Casio graphing calculator as an experiment for his own amusement. Davidson later moved development of Artillery to the Amiga in August 1993, which allowed to expand his idea further, leading him to introduce new elements and a graphical style to distinguish his project from its spiritual predecessors. Davidson wanted to achieve the same animation quality and humour seen in Lemmings, which led him to employing worms as characters for his project after various character design experiments through Deluxe Paint.

With the addition of worms as characters, and inspired by a Blitz BASIC programming competition held by Amiga Format magazine, Davidson renamed his project from Artillery to Total Wormage (possibly in reference to Midway's Total Carnage). Featuring 55,000 levels, publications compared it with both Lemmings and Cannon Fodder due to its visual style and themes, which Team17's project manager Marcus Dyson later claimed was planned from start. However, Davidson's entry neither won the competition or reached any place for classification. Davidson then pitched his project to multiple publishers with no success, before showcasing his game during ECTS in September 1994, where he met Team17 co-founder Martyn Brown, who would make an offer on-the-spot to develop and publish it. Level designs are randomly generated by the use of an alpha-numeric string as their seeds. The object and landscape sets used to generate the field are arranged into thematics including forests, Martian terrains, beaches and hell.