San Andreas Sightseer Achievement
San Andreas Sightseer30
Explore all of Los Santos and Blaine County.
The entire island of San Andreas is open from the start; however, the world will be hidden on your map by dark clouds of fog until you have explored that area. Once you have explored a certain section of the map, the fog will clear up and you can see the map as normal.
Even though most of the map will be uncovered through natural story progression, the best way to uncover the map quickly would be to use a plane or helicopter. Unlike cars, aircraft will uncover the world much faster as opposed to maneuvering through every street, mountain pass or body of water. Once you have cleared up about 98% of the island and the surrounding waters, the achievement will unlock.