there is no Jetpack in grand theft auto liberty city storiesyou can find it on grand theft auto San andrras
well ucant in grad theft auto 3
it is not unlockable but if u want it , go to the gta 7 vicecity and you will find it at that car shop.
cheatplanet.com
Find one, there is no cheat for it
some where
cheat or find one.
in the quarry
you find it
look on youtube
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.
One can find 'Let's Play' videos of Grand Theft Auto on the video sharing website YouTube. There one can find dozens of such videos that have been uploaded.