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
Reign Of Terror	Sabaton			3:54	Primo Victoria	2005	E Standard	mute	1970-01-01
Reign Of The Hammer	HammerFall			2:53	Threshold	2006	Eb Standard	mute	1970-01-01
Reign Of The Tyrants	Jag Panzer			3:37	Ample Destruction	1984	Eb Standard	mute	1970-01-01
Reign of Darkness	Thy Art Is Murder			3:38	Hate	2012	AEADG	mute	1970-01-01
Reinventing The Wheel To Run Myself Over	Fall Out Boy			2:24	Take This To Your Grave	2003	E Standard	mute	1970-01-01
Reise, Reise (Full Album)	Rammstein			47:45	Reise, Reise (Full Album)	2004	D Drop C	mute	1970-01-01
Reject Yourself	Killswitch Engage			4:50	As Daylight Dies	2006	D Drop C	mute	1970-01-01
Relax and Reflect	Yoko Shimomura			3:00	Final Fantasy XV OST	2016	E Standard	mute	1970-01-01
Release From Agony	Destruction			4:44	Release From Agony (SPV, 076-7	1987	E Standard	mute	1970-01-01
Relentless Reckless Forever	Children of Bodom			4:44	Relentless Reckless Forever	2011	D Drop C	mute	1970-01-01
Relief	Bury Tomorrow			2:53	Portraits	2009	E Standard	mute	1970-01-01
Relief	Sixx AM			4:24	Modern Vintage	2014	Drop D	mute	1970-01-01
Remains of Summer Memories	Rise Against			1:21	The Unraveling	2001	E Standard	mute	1970-01-01
Remains of You	Six Feet Under			3:25	Haunted	1995	D Standard	mute	1970-01-01
Remember Me M.F.M... Iron Gate	Sonic Adventure 2			2:25	Sonic Adventure 2	2001	E Standard	mute	1970-01-01