This year, Deep Purple and Black Sabbath — two of the longest-running shows in hard rock and early British metal — are releasing highly anticipated studio albums.

The Rolling Stones played a surprise gig at the EchoPlex, a small club in Los Angeles, this past Saturday night, April 27. The Stones announced the gig via Twitter that afternoon, sending thousands of fans scrambling to the Echo Park neighborhood club, which holds only 700 people. Tickets were $20.

The following content is related to the June 2013 issue of Guitar World. For the full range of interviews, features, tabs and more, pick up the new issue on newsstands now, or in our online store.

The Ocean is a German progressive metal band that began in 2000 and steadily built up a reputation on the strength of their creative experimentation on early albums like Fluxion, Aeolian and Precambrian. Subsequently, they took upon the task of a massive double concept album, released in two parts as Heliocentric and Anthropocentric in 2010.