Cheat mode:

　　Enter DoggieStyle as a case-sensitive name to unlock all bonuses.

　　Super Cop mode:

　　Successfully complete story mode under the normal difficulty setting.

　　No damage mode:

　　Successfully complete the Roof Tops level in Super Cop mode.

　　Infinite ammo:

　　Successfully complete the Groove level in Super Cop mode.

　　Infinite adrenaline:

　　Successfully complete the Back Streets level in Super Cop mode.

　　All weapons:

　　Successfully complete the Villa level in Super Cop mode.

　　Incredibly fit dog mode:

　　Successfully complete the Under Rink level in Super Cop mode. This mode results in unlimited Shadow attacks.

　　Superdeform mode:

　　Successfully complete the Pink Starfish level in Super Cop mode. This mode results in big head, feet, and hands.

　　Normal Challenge mode:

　　Successfully complete story mode under the normal difficulty setting to unlock challenge mode with normal difficulty.

　　Fists Of Flame mode:

　　Successfully complete the Abattoir level in Super Cop mode.

　　Cabal Boss multi-player skin:

　　Successfully complete the Dock Yard level in Super Cop mode.

　　Maxine multi-player skin:

　　Successfully complete the Manson level in Super Cop mode.

　　Other multi-player skins and levels:

　　Successfully complete story mode under the normal difficulty setting. You will unlock a new skin or level for each level completed.

　　Biker 2 skin: Chapter 1

　　Bar level: Chapter 2

　　Biker Boss skin: Chapter 3

　　Triad 2 skin: Chapter 4

　　Jack 2 skin: Chapter 5

　　Triad Boss skin: Chapter 6

　　Militia 2 skin: Chapter 7

　　Militia Boss skin: Chapter 8

　　Cabal 1 skin: Chapter 9

　　Cabal 2 skin: Chapter 10

　　Mansion level: Chapter 11

　　Whisper skin: Chapter 12