Customization is a core pillar of the Ultimate Mayhem experience:

: Single-player missions feature newly voice-acted intro sequences and lip-synced FMVs. Multiplayer and Game Modes

The game is essentially two full titles in one, providing significant depth for solo players:

: Allows players to construct custom-built weaponry by selecting various components and payloads (like hotdogs or spaceships), which remain secret until deployed in battle.

: Features 38 standard weapons and utilities, including classics like the Concrete Donkey , Holy Hand Grenade , and Super Sheep , alongside newer additions like the Fatkins Strike .