You can't.
However, members who pay a monthly fee to Poptropica (currently three or four dollars a month) are eligible for Early Access, which is normally 4 weeks earlier than the general free release of the island. For the 14th island, Steamworks Island, early access was August 12, 2010, followed by general access on September 9.
There is currently a free sneak peek at a small part of Great Pumpkin Island, the 15th island and the second Halloween theme, the first being the Haunted House game available free in the Poptropica store.
You can only play islands that are on the island map. Until then, they are not even on the servers.
NO 1.000,000,000 times NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
You can only play an island on Poptropica early if you're a member of the site, like you have to purchase membership. If you're not a member, you can know when they come out if you sign up to be emailed when it comes out. When an island is soon to come they will advertise it on the site.
Ghost Story island is the 23rd island in Poptropica (January 12, 2012) and was preceded by Game Show island.
A new island comes along every 2 months.
it is called Master Island and comes out on December 14 2088, so you might not be alive when it comes out.
The tag "undefined" comes up when an island is displayed on the island Map for Poptropica, but its link is not recognized by the web browser. This was very rare after 2009.
wait until the next island comes out!
It comes out May 2
Register at PoptropicaClick on the buton that says "Sign up to be e-mailed when this island is released".Check your e-mail every day. You will get an e-mail a day before the island comes out.
It comes out in about a year. Later in 2010 we will know the name.
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