ShredDB is an experimental .shred library, I removed the audio so it's pretty useless. You can find the source .psarc files here.

Song Artist Play Shred Length Album Year Tuning Uploader Updated Delete
PsychoMetal Church3:37The Dark1986E Standardmute1970-01-01
Pulse Of A New EraEntheos4:45Dark Future2017AEADGmute1970-01-01
Punishment ParkIndochine3:52Punishment Park1991E Standardmute1970-01-01
Purest MomentumGürschach8:28Dark Matter2017D Standardmute1970-01-01
Queen Of Winter, ThronedCradle Of Filth10:26V empire Or Dark Faerytales In1996D Standardmute1970-01-01
Rakuen ProjectRay1:32To Love Ru Darkness OP2012Drop Dmute1970-01-01
Raped By The Light Of ChristAt The Gates2:54With Fear I Kiss The Burning Darkness1993B Standardmute1970-01-01
Rapture in ExileDarkest Hour2:14Darkest Hour (Self-titled)2014D Drop Cmute1970-01-01
Ravage Inc.D1ofAquavibe2:19iDarkness2012E Standardmute1970-01-01
Ready To RockAirbourne5:24Black Dog Barking2013E Standardmute1970-01-01
ReadyfuelsAnberlin3:40Blueprints For The Blackmarket2003Drop Dmute1970-01-01
Regret NotAll That Remains4:23This Darkened Heart2004D Standardmute1970-01-01
Remarkably HumanNick Johnston6:41Remarkably Human2016Eb Standardmute1970-01-01
Requiem K626. VIII. LacrimosaWolfgang Amadeus Mozart2:49The 99 Darkest Pieces of Class1792E Standardmute1970-01-01
RevengeDanger Mouse & Sparklehorse4:52Dark Night of the Soul2010E Standardmute1970-01-01