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just keep donig the missions and beating them.. pretty soon you'll get to go to other islands.
In every gta game you have to unlock them but in gta 4 you put cheats in. The other gta games you can fly by completing the missions. If you are on about the big passenger planes you cannot fly them in any gta game apart from san Andreas and gta 4 but in gta 4 you have to buy them with Microsoft live points.
Its compulsary to do missions to unlock other islands in Vice City . After completing ' Guardian Angels ' mission , you unlock the second Island and after completing the ' Phnom Phen 86 ' mission the final island gets unlocked . Otherwise, you an take a car, type SEAWAYS and drive to any island from water.
there is no other way to get it. you have to complete all the missions to get it
You have to complete certain missions before the other cities are unlocked. When you get to go to San Fierro, it is when you are driving Truth's Moonbeam to the garage in San Fierro that CJ won in the race with Catalina and Claude. After completing the Flying School missions and achieving his pilot's licence, CJ will get a phone call from Woozie, inviting him to visit the new casino in Las Venturas.
you have to do a lot of missions
You have to get a certain amount of stars in the other special ops missions and it unlock them one by one till you get to echo
You unlock other islands by completeing other islands.Sometimes the map is given by the person you help.If you fill up the king points gauge the king will send you maps which let you access other islands.
you need to get to the other city and pass missions.
you have to finish the other missions
Completing other missions and finishing story mode levels. There are a total of 49 or so missions, and after that you unlock the Kakashi Saga
you finish all the other missions on that tier then it should unlock