Grand Theft Auto and it's many episodes really is a classic under the sandbox-games. You possess so much flexibility and can do anything and everything that appeals to you, which you will not be able to do in normal level-based game titles.
Nevertheless sometimes a mission assignment will be really hard to complete, or the regular "running over people, car-chases" with the cops turn out to be boring. It's actually those occasions that you should probably bring up your cell-phone and use one or perhaps even many of the over 500 available cheat codes for Grand Theft Auto!
Make Your Car Fly: This is actually one of my favorites, it's so much fun to get in your car, then enter "321-555-8031" on your cell-phone and off you go!
You can really fly everywhere where you can't normally go with or without car, how about flying over water or instead of running over pedestrians you can now "fly over pedestrians"...
Get A Police Chopper Delivered To You: If you've had enough of flying cars, just call "FLY-555-0100" on your cell to get a Police Chopper delivered right in front of you.
Become Invincible: If you ever (actually this happens quite often) run out of ammo, health or armor just dial quickly "482-555-0100" and you will never ever again run out. Now you are completely invulnerable!
The above codes are my three favorite cheat codes I basically use on a daily basis. There are tons more codes and things you can use these cheats for... The sad part is that it is really not easy to either compile a list of all cheat codes yourself, or to find one online. If you have already searched Google for cheat code lists for GTA you will know what I'm talking about. Most of these websites just copied and pasted some cheat codes from another site, and that site from the site before and so on.
The developers of Grand Theft Auto did a really good job implementing all of these cheat codes, all these "hacks" have to be programmed, the effects designed and implemented by graphic artists. So it's not as if these cheat codes were bugs in the game. The cheats are willingly put there by the developers, for only one reason: To make the game experience more interesting for everyone.
You really shouldn't think it's impossible to find a complete cheat list only because this article said that it's going to be very hard. All it takes is a probably very intense Google search over a few hours or a visit to the authors website! So get your complete list of cheat codes now and start cleaning up the neighborhood in Liberty city!