The best website to find cheats for Grand Theft Auto 4 is without a doubt IGN, they have a comprehensive selection of cheats for many games including Grand Theft Auto 4. Cheats for Grand Theft Auto 4 can also be found in most gaming magazines.
Personaly, I think GTA SA is the best because it actually is the longest game and it has way better cheats
I'd say San Andreas, Grand Theft Auto 4 and some others.
If you would like a selection of GTA San Andreas cheats, suggest you try this site:www.psxextreme.com
The jetpack is not ordinarily available in grand theft auto IV. Your best bet is to check for a mod (or a cheat). If there is a mod available, this would need to be generated by a computer. Suggest you look on the gtawiki site and their modifications and cheats sections, for more information.
For my money i would say San Andreas (SA) Since i have both
my opinon it sanadreas
San andreas
On Grand Theft Auto Online?
The best grand theft auto is GTA4 because it has all these cool effects and stuff (only available on XBOX 360 and PS3
yes. grand theft auto killer city is the best game in the world
San andreas