the lost island is an Easter egg probably the first released. Anyway here's the directions

1.get an air vehicle 2.take off from the airport aim in the direction of the half sunken ship 3.when you reach the island your vehicle will explode so eject as soon as you reach the island.

Bam now in three easy steps you get your "lost badge". So what is so special about this island well as you would expect its derived from the lost series so here's a list of the things you can find here.

  1. a unopenable hatch with numbers from the series
  2. a well type thing with a pedestal in the center
  3. a mass burial pit
  4. a radio tower like the one in bloxywood

5.The Man in Black (floating cloud out to kill you)

Well that's all i know of if you know of anything else add it to the list