HELLOWEEN has begin work on their next studio album in vocalist Andi Deris' Mi Sueno Studios on the island of Tenerife.Footage from the studio including an update from the band is available below.

Bassist Markus Grosskopf comments: "For all those out there who found our special Best-Of ,Unarmed, to be too smooth and calm, I have a great news: The new album will hit you right in the face! It´s gonna be very heavy and contain all Helloween trademarks! Some songs are very powerful and hymnic, others contain the fastest bass drum patterns our drummer Dani ever played, and this means a lot! I am really excited about the material we brought together and can´t wait to put my bass tracks on those kick ass Metal songs!"

A release date has been set for October 31st, 2010. Stay tuned for more updates.

Unarmed - Best Of 25th Anniversary is Helloween’s ‘thank-you’ to millions of fans old and new and will prove their exceptional position on the international metal scene. Instead of putting together a regular greatest hits compilation featuring their most successful tracks to celebrate this anniversary, the five band members completely rearranged the greatest melodies they had written in the course of their career to date.

The album features Supercharge’s exceptional saxophonist Albie Donnelly, Hellsongs’s vocalist Harriet Ohlsson, pianist Matthias Ulmer, plus the 70-piece Prague Symphonic Orchestra and the choirs of the Gregorian singers!

As a special surprise, Helloween have come up with ‘The Keeper's Trilogy’ a stunning 17-minute medley of the songs ‘Halloween’, ‘Keeper Of The Seven Keys’ and ‘The King For A 1000 Years’, recorded in cooperation with the Prague Symphonic Orchestra and likely to send shivers of delight down the spine of every Helloween fan.

Unarmed - Best Of 25th Anniversary sees Helloween commemorate their 25th anniversary in their very own way.

“We aren’t one of those bands who like to celebrate themselves,” says Weikath. “We wanted to say thank you in a special way to all our fans who have followed us through the past 25 years - to us, this album stands for an official celebration. We had a lot of fun recording our most important tracks in an entirely new ‘outfit’ and with new arrangements. Now we can’t wait to find out how our fans will react.”

Unarmed - Best Of 25th Anniversary tracklisting:

'Dr. Stein'

'Future World'

'If I Could Fly'

'Where The Rain Grows'

'The Keeper's Trilogy'

'Eagle Fly Free'

'Perfect Gentleman'

'Forever & One'

'I Want Out'

'Falling To Pieces'

'A Tale That Wasn't Right'