All cheats has to be entered as names: 
 
LIVELONG -- God mode.
GODOFGTA -- All weapons with full ammo.
EATSOUP -- Free shopping.
BUCKFAST -- People more aggressive.
GOREFEST -- More gore.
MUCHCASH -- $500,000.
 
To activate the following cheats you 1st have to place GOURANGA as name. 
Now erase this again and type in: 
 
GODOFGTA - All weapons 
EATSOUP - Shop for free 
COCKTART - No point counter 
NEKKID - Pedestrians naked 
CUTIE1 - 99 lives 
IAMDAVEJ - 999.9999 points 
SEGARULZ - Points 10X 
BUCKFAST - Aggressive pedestriants 
ARSESTAR - Keep weapons after death 
TUMYFROG - All level incl. bonus level accessible 
FISHFLAP - Mini cars 
GOREFEST - Blood 
DANISGOD - 200.000 credits 
VOLTFEST - Unlimited electro gun 
LASVEGAS - Pedestrians look like Elvis 
FLAMEON - Unlimited flame thrower 
HUNSRUS - Invisibility 
SCHURULZ - Damage 2X 
UKGAMER - All areas 
JAILBAIT - Free from jail 
MADEMAN - Max respect 
RSJABBER - Invulnerability 
HAMSTER - All people look like hamster
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Bonus level:
Find all GTA 2 Shields and you get to play a 3. special level.
Power-ups:
Abandon your car on the junk yard to recieve the power-up:
Car -- Power-up:
Aniston BD4 -- Out og prison free card.
Beamer -- Flame thrower.
Big Bug -- maschinegun.
B-Type -- Imortality.
Bug -- maschinegun.
Dementia -- Invisibility.
Miara -- Rocket Launcher.
Michelli Roadster -- maschinegun.
Minx -- ElectroFingers.
Police Car -- Police bribe.
Romero -- Armor.
Schmidt -- Energy.
Shark -- Molotov Cocktails.
Taxi -- Dobble damage.
U-Jerk Truck -- maschinegun.
Z-Type -- Silenced maschinegun.