Band: Crom (SPA)

Excellent Spanish band formed in 1983 that blurred the boundaries between heavy, thrash and speed in their own unique style of metal. As a point of reference, think of a very early Helloween, when Hansen was still singing and they had a thrashier sound. Together with Legion and Fuck Off they are credited with introducing the speed/thrash sound to the Spanish rock scene.
They released 2 full-lenght conceptual albums in the 80's, which is certainly not a common thing for this kind of music, let alone 20 years ago, before they decided to call it quits in 1990.