A Spotify Scandinavian metal playlist with quite a large number of Scandinavian heavy metal tracks - 2,500+

Here's wikipedia on heavy metal in general:

"Heavy metal (often referred to simply as metal) is a style of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and the United States. With roots in blues-rock and psychedelic rock, the bands that created heavy metal developed a thick, massive sound, characterized by highly amplified distortion, extended guitar solos, emphatic beats, and overall loudness. Heavy metal lyrics and performance styles are generally associated with masculinity and machismo. The first heavy metal bands such as Led Zeppelin, Black Sabbath and Deep Purple attracted large audiences. However, these bands were often critically reviled; this was a status common throughout the history of the genre. In the mid-1970s Judas Priest helped spur the genre's evolution by discarding much of its blues influence; Motörhead introduced a punk rock sensibility and an increasing emphasis on speed. Bands in the New Wave of British Heavy Metal such as Iron Maiden followed in a similar vein. Before the end of the decade, heavy metal had attracted a worldwide following of fans known as "metalheads" or "headbangers". In the 1980s, glam metal became a major commercial force with groups like Mötley Crüe. Underground scenes produced an array of more extreme, aggressive styles: thrash metal broke into the mainstream with bands such as Metallica and Megadeth, while other styles like death metal and black metal remain subcultural phenomena. Since the mid-1990s, popular styles such as nu metal, which often incorporates elements of grunge and hip hop; and metalcore, which blends extreme metal with hardcore punk, have further expanded the definition of the genre."

And here are some of the tracks from the playlist:

• In Flames - Alias
• In Flames - Come Clarity
• Soilwork - Distortion Sleep
• In Flames - Dead End
• In Flames - Take This Life
• In Flames - The Mirror's Truth
• In Flames - Crawling Though Knives
• Soilwork - Stabbing The Drama
• Soilwork - Rejection Role
• Soilwork - Nerve
• Clawfinger - Biggest & The Best
• In Flames - Metaphor
• Finntroll - Trollhammaren
• Children Of Bodom - Downfall
• Mustasch - Bring Me Everyone
• Amon Amarth - The Pursuit Of Vikings
• Meshuggah - Bleed
• In Flames - Reroute To Remain
• Children Of Bodom - Oops!...I Did It Again
• Children Of Bodom - Needled 24 / 7
• Soilwork - Distance
• Soilwork - Light The Torch
• Soilwork - Overload
• In Flames - Black & White
• In Flames - Dawn Of A New Day
• In Flames - Leeches
• At The Gates - Slaughter Of The Soul
• Children Of Bodom - Children Of Bodom
• Stratovarius - Eagleheart
• Soilwork - Weapon Of Vanity
• In Flames - Drenched In Fear
• Soilwork - Departure Plan
• Dimmu Borgir - Puritania
• Mustasch - Dogwash
• Opeth - Harvest
• Soilwork - Follow The Hollow
• In Flames - Versus Terminus
• In Flames - Egonomic
• Dimmu Borgir - Mourning Palace
• Opeth - Ghost of Perdition
• In Flames - Vanishing Light
• At The Gates - Blinded By Fear
• In Flames - Our Infinte Struggle