Dial COP-555-0150 (267-555-0150) to add a star to Niko's wanted level if it's all proving just a bit too easy for your criminal mastermind.
Dial FLY-555-0100 (359-555-0100) to spawn a police helicopter.
Dial GUN-555-0150 (486-555-0100) to unlock some seriously heavy new weapons, including an RPG, grenades, a sniper rifle and a surprisingly handy baseball bat.
Dial COP-555-0100 (267-555-0100) to remove Niko's wanted level if you've got too many of Liberty City's finest on your tail.
Cheat: Go to an internet cafe and type in craplist.net, then go to women seeking men. The exit and the time shown above the radar is your dating time.
There you find party girl Lancaster in the list that is displayed. By dating Alex you get the benefit of a 50% discount for whatever clothes you buy from any store!
To access the cheats, simply press Up on the D-pad to bring out Niko's mobile phone. Then, enter one of the following codes to activate the corresponding cheat function.