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
Despacito (Metal Cover)	Luis Fonsi Ft Daddy Yankee			2:52	Despacito	2017	E Standard	mute	1970-01-01
Discord (Metal Version) (Eurobeat Brony Cover)	The L - Train			4:23	Youtube - The L - Train	2013	C# Drop B	mute	1970-01-01
Elastic Heart (Sia Metal Cover)	Leo Moracchioli			4:51	Leo Metal Covers Volume 5	2015	D Drop C	mute	1970-01-01
Elastic Heart Drop D (Sia Metal Cover)	Leo Moracchioli			4:51	Leo Metal Covers Volume 5	2015	Drop D	mute	1970-01-01
Enter The Metal World	Battle Beast			4:43	Steel	2012	E Standard	mute	1970-01-01
Enya Only Time Metal Remix	MetalRR5			3:12	Youtube Channel	2011	Drop D	mute	1970-01-01
Eye of the Tiger (Metal Cover ft Rob Lundgren)	Leo Moracchioli			4:34	Leo Metal Covers Volume 8	2016	Custom Tuning	mute	1970-01-01
Eye of the Tiger Drop D (Metal Cover ft Rob Lundgren)	Leo Moracchioli			4:34	Leo Metal Covers Volume 8	2016	Drop D	mute	1970-01-01
FAIRY TAIL Main Theme -METAL ver.-	Takanashi Yasuharu			2:05	Fairy Tail Original Soundtrack Vol.2	2010	E Standard	mute	1970-01-01
Feel Good Inc (Metal Cover)	Leo Moracchioli			4:03	iTunes	2015	Drop D	mute	1970-01-01
Gate of Steiner (Metal Cover)	Ferdk			4:55	YouTube	2015	D Standard	mute	1970-01-01
Gladiator Metal Medley	Epic Progressive Themes			7:59	Youtube Channel	2013	E Standard	mute	1970-01-01
Gladiator Theme Now We Are Free Metal Remix	MetalRR5			2:37	Gladiator OST	2000	Drop D	mute	1970-01-01
Heavy Metal (Is the Law)	Helloween			4:00	Walls of Jericho	1985	E Standard	mute	1970-01-01
Heavy Metal (Takin' A Ride)	Don Felder			4:47	Heavy Metal Soundtrack	1981	E Standard	mute	1970-01-01