Cheat List

Pause the game while playing and hold the PSP's L and R buttons and enter the associated key sequence.

All weapons: UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE
Invincibility: UP, UP, DOWN, DOWN, LEFT, LEFT, RIGHT, RIGHT, SQUARE, TRIANGLE
All Upgrades: DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE
Porable Ammo Dump: TRIANGLE, TRIANGLE, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE, DOWN, RIGHT

Submitted by fallingdragon

Unlimited Ammo: TRIANGLE, TRIANGLE, X, X, SQUARE, CIRCLE, SQUARE, CIRCLE, RIGHT, DOWN

Submitted by dwarfeater

Big Head: TRIANGLE, CIRCLE, X, SQUARE, TRIANGLE, UP, RIGHT, DOWN, LEFT, UP
Giant Scythe: TRIANGLE, SQUARE, X, CIRCLE, TRIANGLE, UP, LEFT, DOWN, RIGHT, UP
Free Seep: LEFT, LEFT, RIGHT,RIGHT, LEFT, RIGHT, LEFT, RIGHT, X, X
Earn Assist Extender: UP, UP, DOWN, DOWN, TRIANGLE, TRIANGLE, X, X, TRIANGLE, TRIANGLE
Earn a Widget RIGHT, UP, DOWN, UP, TRIANGLE, UP, LEFT, SQUARE, TRIANGLE, RIGHT

Submitted by Shame

Hint: More Scythe Moves

Once you collect four Weapon Widgets, pay Smith and Weston to unlock "More Scythe Moves". Then, use the following combinations:

Circle Spin: SQUARE, SQUARE, TRIANGLE
Dive Attack: X, X, SQUARE
Powerful Combo Hit: SQUARE, SQUARE, SQUARE
Uppercut: SQUARE, SQUARE, X