Top 10 Metal Songs Featuring Keyboard InstrumentsKeyboard instruments are: piano, organ, accordion, electronic keyboards, including synthesizers and digital pianos. Yes, all instruments that use a keyboard count.
Keyboard instruments in metal are used to setup a progressive sound but they aren't used only in prog metal as you can see from this list.
I would like to quote a comment I've read on the Internet that is amusing but for many it would be also true:
"Pianos + Metal is a great combination. Makes you want to jump in a field of daisies and still feel straight".
The Top Ten Metal Songs Featuring Keyboard Instruments
At #1 because Deep Purple is where it all started (although their first song with this combination was Hard Lovin' Man, 1970). - Metal_Treasure
A masterpiece with real piano by Jon Oliva. - Metal_Treasure
A great song and Jens Johansson is incredible. - Metal_Treasure
Real piano in a technical death metal song - Metal_Treasure
My favorite keyboard part, especially live. Just purely beautiful. - JoLeKosovo
Real piano used in technical death metal - Metal_Treasure
The keyboard uses in this song is quite underrated. - zxm
Real piano intro, some of the best vocals by Hansi ever. Sadly, it's one of the most underrated Blind Guardian songs. It's very proggy and a bit softer than their usual songs but it's very intense. - Metal_Treasure