Probably the most influencial power band to come out of europe along with blind guardian ... You can split Helloween into two parts...one if the melodic speed power metal band heard throughout the 80's with classic albums such as Walls Of Jericho and
Keeper Of The Seven Keys Part 1+2.
The other is the band lost without kai hansen and
michael kiske , a much different band which has lost the brilliance from the 80's...and replaced it with singer andi
deris who is very poor live
Greatest Work is Keeper Of The Seven Keys