Worms Ultimate Mayhem

As with all previous 3D Worms games, Worms Ultimate Mayhem features a 3D, turn-based artillery strategy that allows players to move freely in all directions. In the game lobby, players are able to choose from a wide variety of different weapons and use them when the game starts. At the start of the game, each player takes control of a team of worms. Due to the game's turn-based nature, each player controls one worm at a time within a set time limit; when the time limit expires, the worm fires a weapon, or the worm takes damage for any reason, the player's turn ends and game proceeds to the next player's turn.

The objective of the game is to eliminate all of the enemy team worms. There are two ways a worm can be eliminated. The simplest, usual way is to deplete the worm of its health using any of the weapons available; some weapons provide the ability to push or knock back worms. The other, faster way is to knock the worm into the water, causing it to die as soon as it comes there.

Worms Ultimate Mayhem received "mixed or average" reviews, according to review aggregator Metacritic. Critics usually praised the multiplayer and panned the camera angles, although Play magazine considered the latter improved over earlier 3D titles. TeamXbox believed that multiplayer was undoubtedly the best part for its breadth of content and customisation, but criticised the diminished dramatic effect of weapons on the environment compared to the game's 2D installments, as well as widely inconsistent artificial intelligence ranging from incompetence in campaign mode to firing bazooka shots with unrealistic accuracy in Quick Play. GameSpot noted some graphical improvement, but also lengthy loading times, particularly when restarting challenges, and that moves requiring dexterity, such as those using a ninja rope or a jet pack, were hampered by the game's transition to 3D and the resulting environmental structure and unhelpful camera angles.

Whilst praising the wealth of weapons, it was disappointed by the weapon creation system, which it found was constrained to damage sliders and modifiers that still failed to produce a dramatic effect seen in the 2D counterparts. Destructoid criticised the controls, how the worms move, and the fact that, when paired with the turn-based nature of the game, both render single-player experience tedious.