Worms World Party is a game which shares the bulk of its gameplay with Worms: Armageddon. It introduces the following:

• the Wormpot, a mechanic which allows the use of up to 3 modifiers to change the gameplay for the next match (e.g. automatically rising water levels, blood effects, slippery terrain...)
• new campaign missions
• co-operative campaigns
• forts game mode
• new predefined maps
• all schemes available from the start

The Game Boy Advance version of the game includes two weapons which were removed from Worms: Armageddon but were present in Worms 2 - the Homing Cluster Bomb and the Homing Airstrike, as well as a weapon absent from all other Worms games - the Chainsaw.