Unlock Everything:
Enter your name as 'DoggieStyle' (case sensitive).

Unlock 'Normal Challenge' mode - Beat game in Normal mode

Unlock 'Supercop' mode (Hard difficulty) - Beat game in 'Normal' mode

Unlock 'Super Deformed' mode:
Complete Stage 2 (Pink Starfish mission). Unlock Infinite Ammo:
Complete Stage 4 (Train Yards mission)

Unlock Infinite Adrenaline:
Complete stage 5 (Back Streets mission).

Unlock Incredible Fit Dog:
Complete stage 6 (Under Rink mission).

No Damage:
Beat Rooftops mission in 'Supercop' difficulty.

All Weapons:
Beat Villa mission on 'Supercop' difficulty.

Fists of Flame:
Beat Old Church mission on 'Supercop' difficulty.

Cabal Boss Skin:
Beat Dockyards mission on 'Supercop' difficulty.

Maxine Skin:
Beat The Mansion mission on 'Supercop' difficulty.


To unlock the following bonuses complete these chapters on Rookie/Normal:

Biker 2 (Multiplayer Skin) - Chapter 01

Bar (Multiplayer Arena) - Chapter 02

Biker Boss (Skin) - Chapter 03

Triad2 (Skin) - Chapter 04

Jack2 (Skin) - Chapter 05

Triad Boss (Skin) - Chapter 06

Militia2 (Skin) - Chapter 07

Militia Boss (Skin) - Chapter 08

Cabal1 (Skin) - Chapter 09

Cabal2 (Skin) - Chapter 10

Mansion (Arena) - Chapter 11

Whisper (Skin) - Chapter 12