Enter Square, Circle, Triangle, Circle, Square, X, Triangle, X as a code at the extras screen to unlock everything.
Alternate Deaths
Enter Square, Square, Square, Square, Square, Square, Square, Square as a code at the extras screen.
Expert Mode
Enter Square, X, Circle, Triangle, Circle, X, Sqaure, Triangle as a code at the extras screen.
Gibby Explosions
Enter Triangle, Circle, X, Square, Triangle, Circle, X, Square as a code at the extras screen.
Infinite Ammo
Enter Square, Triangle, X, Circle, Square, Circle, X, Triangle as a code at the extras screen.
Infinite Grenades
Enter Circle, X, Circle, Square, X, Circle, X, Circle as a code at the extras screen.
Rapid Rails
Enter Circle, Square, Circle, Square, X, X, Triangle, Triangle as a code at the extras screen.
Reign Of Fire Mode
Enter Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle as a code at the extras screen.
Super Health
Enter X, X, Square, Triangle, Square, Triangle, Circle as a code at the extras screen.
Walking Dead
Enter X, X, X, X, X, X, X, X as a code at the extras screen.