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
Restless Heart Syndrome	Green Day			4:23	21st Century Breakdown	2009	D Standard	mute	1970-01-01
Restless Heart Syndrome (E STD)	Green Day			4:22	21st Century Breakdown	2009	E Standard	mute	1970-01-01
Resurrection Man	Lamb of God			4:59	Lamb of God	2020	D Drop C	mute	1970-01-01
Retaliation / Realm of Rain	A Canorous Quintet			7:58	The Only Pure Hate	1998	C# Standard	mute	1970-01-01
Retrieving My Carcass	Fleshgod Apocalypse			4:13	Oracles	2009	B Standard	mute	1970-01-01
Retrieving My Carcass	Fleshgod Apocalypse			4:11	Oracles	2009	Custom Tuning	mute	1970-01-01
Return Of The Los Palmas 7	Madness			2:37	Absolutely	1980	E Standard	mute	1970-01-01
Return Of The Mack	Mark Morrison	Bass2		3:51	Return Of The Mack	1996	Custom Tuning	mute	1970-01-01
Return Of The Nemesis	Deathchain			3:29	Deathrash Assault	2005	D Standard	mute	1970-01-01
Return To Me	Unleash The Archers			5:44	Abyss	2020	BEADG	mute	1970-01-01
Return of the Vampire...1993	Mercyful Fate			5:12	In the Shadows	1993	E Standard	mute	1970-01-01
Return to Metalopolis	Chris Poland			3:09	Return to Metalopolis	1990	E Standard	mute	1970-01-01
Return to the Alamo	The Shadows			4:09	Tasty	1977	E Standard	mute	1970-01-01
Returning The Smile You Have Had From The Start	Emery			3:07	The Question	2005	Eb Drop Db	mute	1970-01-01
Rev Thinks the Beatles Are Death Metal	Vargskelethor			0:44	The Revnarok	2014	E Standard	mute	1970-01-01