The Warriors Cheats

Unlock Fury Mode
Clear the game on Hardcore difficulty to unlock the Unleash the Fury. In this new mode you play through the main game as the Baseball Furys gang. (Unverified

Unlock Arcade Machine
Clear the game once on Normal or higher difficulty and an arcade game at the hangout will be available (called The Warriors Armies Of The Night). To actually play the machine though, you need to clear all the Flash Back levels.

Cheats
When playing input the following cheat codes.

100 percent completion
… L1, SELECT, SQUARE, DOWN, L2, RIGHT
Unlimited Health
… UP, TRIANGLE, L3, SELECT, CROSS, L2
Unlimited Rage
… SQUARE, CIRCLE, TRIANGLE, SELECT, CROSS, LEFT
Unlimited sprint
… DOWN, SQUARE, LEFT, CROSS, L1, SELECT
Get a pipe
… R2, CIRCLE, SELECT, UP, L1, RIGHT
Get a machete
… L1, CROSS, R1, R1, SELECT, R2
Get a knife
… DOWN, DOWN, SELECT, UP, UP, L3
Get a bat
… SQUARE, R2, DOWN, DOWN, L1, L1
Escape from cops
… UP, SELECT, CROSS, TRIANGLE, TRIANGLE, SQUARE
Complete current stage
… DOWN, SQUARE, CROSS, SELECT, R1, LEFT
All items and $200
… R1, R2, L1, CROSS, DOWN, L1
Unbreakable bat
… L3, L3, CIRCLE, UP, CIRCLE, sELECT
Unlock hobo help
… CIRCLE, CIRCLE, DOWN, R2, L2, CIRCLE
Unlock brass knuckles
… CIRCLE, CIRCLE, CIRCLE, L1, SELECT, TRIANGLE
Unlock improved stamina
… CROSS, L1, DOWN, SQUARE, UP, CROSS
Unlock weapon dealers
… RIGHT, R1, CIRCLE, CROSS, SELECT, SQUARE
Unlock handcuffs
… UP, CROSS, UP, SELECT, L3, L1
Unlock self-uncuff
… TRIANGLE, TRIANGLE, TRIANGLE, SELECT, TRIANGLE, R1
Unlock cuff keys
… LEFT, CROSS, CROSS, R2, L1, DOWN
Unlock steel toe boots
… R3, R2, R1, L3, L2, L1
Unlock more flash
… DOWN, LEFT, UP, UP, SQUARE, RIGHT
Unlock improved sprint
… L2, SELECT, SELECT, SELECT, SELECT, TRIANGLE
Unlock hobo recruitment
… R1, R1, L1, R1, L1, UP

The Warriors Cheats

Cheat: Get Brass Knuckles
During the game CIRCLE, CIRCLE, CIRCLE, L, SELECT, TRIANGLE.

Unlockables: Various
100% Complete Story Mode
– L, Select, Square, Down, L, R
Acquire Bat
– L, L, Circle, Up, Circle, Select
Acquire Knife
– Down, Down, Select, Up, Up, L
Acquire Machete
– L, X, R, R, Select, R
Automatically Complete Current Mission
– Down, Square, X, Select, R, L
Unlocks All Dealers
– Right, R, Circle, X, Select, Square
Unlocks Handcuffs
– X, Up, Select, L, L
Unlocks Keys for Handcuffs
– Left, X, X, R, L, Down
Unlocks Unlimited Health
– Up, Triangle, R, Select, X, L
Unlocks Unlimited Rage
– Square, Circle, Triangle, Select, X, Left
Unlocks Upgraded Flash Capacity
– L, X, R, L, L, Circle
Unlocks Upgraded Stamina
– X, L, Down, Square, Up, X