Helloween never broke into the States market the way they did around the rest of the world, but they are still considered one of the innovators of the modern Power Metal movement.Keeper Of The Seven Keys Part 1 and 2 came out in 1987 and 1988 respectively and really put the band on the map.  They were based on both magical and futuristic themes and were critically acclaimed for their musicianship.

The band remains together today despite going through several different lineup changes. Here's their minor hit they had in the states, "I Want Out" from Keeper Of The Seven Keys Part Two.