When you hear the term "power metal", or more specifically "European Power Metal", Helloween has to be one of the first bands that come to mind, largely due to the impact of this particular album (and its companion piece Keeper of the Seven Keys, Pt. 2). Both albums completely reestablished both the band's sound as well as the whole idea of what power metal was all about. This is due largely to Kai Hansen adopting a more epic approach to his songwriting (as opposed to the Judas Priest style thrashers on Walls of Jericho) as well as the addition of vocalist Michael Kiske, who brought a powerful yet melodic aspect to Helloween's sound.
The way Helloween paired soaring melodies with metal aggression was inspired, and songs like "I'm Alive," "Future World" and "Halloween" essentially served as the blueprint for the new brand of power metal. I don't think the impact of the Keeper albums can be overstated. In the two decades since they were originally released, their sound has been adopted, adapted, and flat out imitated by countless bands. Without Helloween, there would be no Blind Guardian, no Rhapsody, no Edguy, at least not as we now know them.
If you're a power metal fan and for whatever reason haven't heard Keeper of the Seven Keys Part I, you need to order this album now. It truly belongs in every power metal fan's collection.
That said, why on earth has it taken 20 freaking years to get remastered versions of the Keeper albums? In an age where even the most recent bands keep reissuing their albums, we had to go way to long without a sonically improved Keeper of the Seven Keys Part I. Well, Sanctuary finally got around to the job in 2006, and they certainly did it right. In addition to digitally remastered sound (which is quite good despite what a previous reviewer would have you believe), you get four bonus tracks. The remixed/alternate/edited versions of existing songs don't add much, but adding the b-side "Victim of Fate" was a nice touch. You also get expanded liner notes by Metal Hammer scribe Dave Ling, photos, etc. plus a nifty slipcase for the disc.
This is what a remastered version of a classic album is supposed to look and sound like. If you're a Helloween fan and already own this album, it's time to replace your old version.