All these backing tracks come from Rock Band/Guitar Hero/Jammit, so I can only upload backing tracks of songs in those games.
All of them are free to use.
Drop any requests you need :)

Alice In Chains - Would? (Guitar Backing Track)
3:45
Alice In Chains - Would? (Guitar Backing Track)
Alice In Chains - Man in the Box (Guitar Backing Track)
4:55
Alice In Chains - Man in the Box (Guitar Backing Track)
Green Day - Whatsername (Guitar Backing Track)
4:14
Green Day - Whatsername (Guitar Backing Track)
Green Day - Homecoming (Guitar Backing Track)
9:22
Green Day - Homecoming (Guitar Backing Track)
Green Day - Wake Me up When September Ends (Guitar Backing Track)
5:00
Green Day - Wake Me up When September Ends (Guitar Backing Track)
Green Day - Letterbomb (Guitar Backing Track)
4:10
Green Day - Letterbomb (Guitar Backing Track)
Green Day - Extraordinary Girl (Guitar Backing Track)
3:44
Green Day - Extraordinary Girl (Guitar Backing Track)
Green Day - She's a Rebel (Guitar Backing Track)
2:10
Green Day - She's a Rebel (Guitar Backing Track)
Green Day - Give Me Novacaine (Guitar Backing Track)
3:40
Green Day - Give Me Novacaine (Guitar Backing Track)
Green Day - St. Jimmy (Guitar Backing Track)
3:06
Green Day - St. Jimmy (Guitar Backing Track)
Green Day - Are We the Waiting (Guitar Backing Track)
2:52
Green Day - Are We the Waiting (Guitar Backing Track)
Green Day - Boulevard of Broken Dreams (Guitar Backing Track)
4:34
Green Day - Boulevard of Broken Dreams (Guitar Backing Track)
Green Day - Holiday (Guitar Backing Track)
4:08
Green Day - Holiday (Guitar Backing Track)
Green Day - Jesus of Suburbia (Guitar Backing Track)
9:16
Green Day - Jesus of Suburbia (Guitar Backing Track)
Green Day - American Idiot (Guitar Backing Track)
3:07
Green Day - American Idiot (Guitar Backing Track)
blink-182 - Aliens Exist (Guitar Backing Track)
3:21
blink-182 - Aliens Exist (Guitar Backing Track)
Green Day - Geek Stink Breath (Guitar Backing Track)
2:19
Green Day - Geek Stink Breath (Guitar Backing Track)
Nirvana - Negative Creep (Guitar Backing Track)
3:05
Nirvana - Negative Creep (Guitar Backing Track)
Nirvana - School (Guitar Backing Track)
2:47
Nirvana - School (Guitar Backing Track)
Nirvana - Blew (Guitar Backing Track)
3:01
Nirvana - Blew (Guitar Backing Track)
Smashing Pumpkins - Today (Guitar Backing Track)
3:36
Smashing Pumpkins - Today (Guitar Backing Track)
Smashing Pumpkins - Cherub Rock (Guitar Backing Track)
5:10
Smashing Pumpkins - Cherub Rock (Guitar Backing Track)
Nirvana - Heart Shaped Box (Guitar Backing Track)
4:48
Nirvana - Heart Shaped Box (Guitar Backing Track)
Nirvana - Rape Me (Guitar Backing Track)
2:52
Nirvana - Rape Me (Guitar Backing Track)
Nirvana - All Apologies (Guitar Backing Track)
3:54
Nirvana - All Apologies (Guitar Backing Track)
Oasis - Supersonic [Live at Glastonbury] (Guitar Backing Track)
4:41
Oasis - Supersonic [Live at Glastonbury] (Guitar Backing Track)
The Smashing Pumpkins - 1979 (Guitar Backing Track)
4:29
The Smashing Pumpkins - 1979 (Guitar Backing Track)
Nirvana - Something In The Way (Guitar Backing Track)
4:01
Nirvana - Something In The Way (Guitar Backing Track)
Nirvana - Polly (Guitar Backing Track)
3:03
Nirvana - Polly (Guitar Backing Track)
Nirvana - On A Plain (Guitar Backing Track)
3:13
Nirvana - On A Plain (Guitar Backing Track)