Update, Volcano is coming to Angry Birds Chrome! Read more »
To play just head to: http://fazer.angrybirds.com/.
Here is what the site has to say about the hidden levels:
Angry Birds, the adventures of the characters in hot Tyrkisk Peber Volcano in the world. To access the hidden fields to search for secret codes Tyrkisk Peber Volcano bag (EAN code), Fazer and the Angry Birdsin Facebook pages and YouTube search for Volcano. Angry Birds are Having an adventure in the fiery Tyrkisk Peber Volcano World. Search for the secret codes to open the hidden levels from Tyrkisk Peber Volcano package (EAN Code), Fazer and Angry Birds and Facebook pages and YouTube is a keyword with the Volcano.
So far we know of the following secret codes, which unlock one level each (thanks to Evan, DanBarth and marabou for helping us out with these):
If you happen to know a secret code please leave a comment below.
Oh, and if you’re like me, you probably have no idea what Tyrkisk Peber is, so here’s what wikipedia has to say:
Tyrkisk Peber (Danish for “Turkish Pepper”) is a strong liquorice candy flavored with ammonium chloride (salmiakki) and pepper, made by the Finnish company Fazer and popular in the country. Tyrkisk Peber was originally invented by Per Fjelsten, his wife’s name was Elly, therefore the company name Perelly, in 1976 and made by the Danish company Perelly, which was taken over by Fazer.
Below is the teaser video from Rovio
Walkthrough videos