Worms Ultimate Mayhem is a 3D artillery turn-based tactics video game developed by Team17. The game is a re-release of Worms 4: Mayhem with improved graphics. It features all-new content story mode voice acting by Guy Harris and other gameplay fixes such as reworked camera controls. The game features turn-based gameplay a single-player campaign and both local and online multiplayer. While primarily based on Worms 4: Mayhem Ultimate Mayhem also includes content from Worms 3D with its campaign and multiplayer maps included in the game.