Unlock Adelphion As Rumble Character: Get back the Tiki costume
Unlock Steel Toed Boots: Beat the Jones Street Boys in Turf Invasion
Unlock Brass Knuckles: Beat the Hurricanes in Turf Invasion
Unlock Hand Cuffs to Use On Enemies: Arrest the Coney Stalker
Unlock Keys: Free Twiggys Contacts
Increased Flash Capacity: Get a Foam Finger while dosed on flash from Twiggy's store
Recruit Bums: Complete the 'Feed the bums' Bonus mission.
Play as the Riffs vs The Rogues: Beat the game
Unlock Arcade Machine: Clear the game once on 'Normal' or higher difficulty setting and the arcade game 'The Warriors Armies of the Night'. To play the game you need to clear all the Flash Back levels.
Unlock Fury Mode: Clear the game on 'Hardcore' difficulty setting to play the main game as the Baseball Furies