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you have to download them from the Internet but its only available for PC not ps3 or xbx360
Sadly anything you've heard about the jetpack in gta iv is a lie , there is infact no jetpack in gta iv , however there is one in gta SA if that is what you meant it is:cheat: Press the following during gameplay: Left, Right, LT, LB, RT, RB, Up, Down, Left, Right I think.