Unlock every Bonuses
While playing, press X, B, X, B, Up, Up, Down, Down.

Cheat Codes
During gameplay, press Y, Y, Y, Y, UP, DOWN, UP, DOWN to get 99 conviction, and press X, X, X, X, UP, UP, DOWN, DOWN to get unlimited ammo.

Unlock All Secrets
While playing the game, press X, B, X, B, UP, UP, DOWN, DOWN.

Unlock Extra Characters
Carpenter - reach melee level 99 with any hunter
Vincent - reach ranged level 99 with any hunter
Werewolf - reach conviction level 99 with any hunter
Joshua - let 250 innocents die

Cheat List
Enter these codes while playing. The cheat effects last for the stage, so if you load a game or load a new map (i.e., go into the next stage), enter the cheat again.

99 COnviction - Y, Y, Y, Y, UP, DOWN, UP, DOWN
Infinite Ammo - X, X, X, X, UP, UP, DOWN, DOWN
God Mode - R, R, A, A, UP, DOWN, UP, DOWN
All Weapons - A, A, A, A, UP, DOWN, UP, DOWN
Weapons Do Insane Damage - B, B, B, B, UP, DOWN, UP, DOWN
All Special Weapons - B, A, B, A, B, A, BLACK, WHITE
Restock Ammo For Selected Weapon - A, B, WHITE, BLACK, B
Melee Attacks Do More Damage - X, X, Y, Y, UP, DOWN, UP, DOWN
Earn All Edges - Y, Y, UP, DOWN, UP, DOWN
Edges Use Zero Conviction - L, L, A, A, UP, DOWN, UP, DOWN
Skip Level - BLACK, L, BLACK, L, UP, DOWN, UP, DOWN
Restore Health - B, B, WHITE, WHITE, WHITE
Play Nightmare Difficulty - BLACK, BLACK, UP, UP, DOWN, DOWN

Art galleries
Here is how to get all art galleries

Art Gallery 1 - Kill Warghoul once
Art Gallery 2 - Kill Demon once
Art Gallery 3 - Kill Santa three times
Art Gallery 4 - Kill Abomination three times
Art Gallery 5 - Kill Warghoul three times
Art Gallery 6 - Kill Black Spiral Dancer three times