Worms Forts: Under Siege is an artillery strategy game done in a turn-based style. In order to win, players must be able to destroy the opposing team or destroy the enemy’s Stronghold, considered to be the most important structure of a team. Players get a team of four worms and take turns shooting, blowing up, bombing, and causing disasters to destroy their opponents’ worms. Each worm is given a set amount of health that decreases with every hit received.
In this game, players can construct buildings to help them in their battle. Hospitals can be built to resurrect worms that have fallen during battle; weapon factories can be constructed to produce weapons, while citadels can be made to deploy weapons. Wonders can also be made and opponents have two turns to attempt to knock it down. If the Wonder remains standing, the player who made it wins.
Worms Forts: Under Siege provides users with a variety of weapons to destroy enemy worms, such as a rocket launcher, a mini gun, a pigeon that serves as a homing missile, and a bazooka. There are also weapons for destroying buildings, including a trebuchet, a Trojan Donkey, and a fridge launcher. Players can catch crates that aid in increasing firepower, health, utilities, and other bonuses. The game comes with a tutorial for first-time players.