Oblique horizon - Kaligare - 2001
Released by Oblique productions
Tracks : 13 / Length : 60:29.68
Digipack

Oceans of slumber - Oceans of slumber - 2020
Released by Century media
Tracks : 12 / Length : 71:37.67

Octa - Sup - 2023
Released by N/A
Tracks : 8 / Length : 48:00.06
Digipack

Octahedron - Mars volta (the) - 2009
Released by Universal Music
Tracks : 8 / Length : 50:08:02

Octane twisted - Porcupine tree - 2012
Released by Kscope
Tracks : 14 - 7 / Length : 56:41.55 – 71:40.29

Odyssey/scala - Tesseract - 2015
Released by Century media
Tracks : 11 / Length : 63:51.07
Digipack
+ DVD

Of mice & men - Of mice and men - 2010
Released by Rise
Tracks : 10 / Length : 33:41.24

Of seismic consequence - Yakuza - 2010
Released by Profound lore
Tracks : 9 / Length : 51:10:36
digipack

Ok computer - Radiohead - 1997
Released by Capitol
Tracks : 12 / Length : 53:29:12

Old school recordings - Dionysos - 2001
Released by Noise product
Tracks : 12 / Length : 36:14:27

Omega point - Stellardrive - 2008
Released by Le sonotone
Tracks : 9 / Length : 44:49.59
digipack
2x

Omelette du fromage - Closet disco queen - 2021
Released by Hummus
Tracks : 7 / Length : 38:58.32
Digipack, limited

On circles - Caspian - 2020
Released by Triple crown
Tracks : 8 / Length : 46:21.11
Digipack

On va tous crever - Sidilarsen - 2019
Released by Verycords
Tracks : 11 / Length : 53:10.36
Digipack

On/off/safety/danger - Birdpen - 2008
Released by Discograph
Tracks : 11 / Length : 54:23.14
Digipack

Once more 'round the sun - Mastodon - 2014
Released by Reprise
Tracks : 11 / Length : 54:12:15

Onda 온다 - Jambinai - 2019
Released by Bella union
Tracks : 8 / Length : 50:43.50
Digipack

One - Tesseract - 2011
Released by Century media
Tracks : 11 / Length : 54:36.34

One hot minute - Red hot chili peppers - 1995
Released by Warner music
Tracks : 13 / Length : 61:26:25

One love - Prodigy - 1993
Released by XL
Tracks : 4 / Length : 19:42:00
Ep
remix by Jonny l

One of us is the killer - Dillinger escape plan (the) - 2013
Released by Party smasher inc.
Tracks : 13 / Length : 49:13:30
digisleeve, limited
digisleeve has a scratch game side

One second - Paradise lost - 1997
Released by Music for nations
Tracks : 13 / Length : 54:58.47
digipack, limited

One second riot - One second riot - 2008
Released by Music fear satan
Tracks : 9 / Length : 41:38:28
digipack

One step more and you die - Mono - 2004
Released by Temporary residence
Tracks : 8 / Length : 51:16:37
digisleeve

One time for all time - 65 days of static - 2005
Released by Monotreme
Tracks : 9 / Length : 37:08:72

Only heaven - Young gods (the) - 1995
Released by Pias
Tracks : 11 / Length : 61:25:30

Only lovers left alive - Jozef van wissem / Sqürl - 2014
Released by Atp
Tracks : 14 / Length : 48:47:64
digipack

Only smith & burrows is good enough - Smith & burrows - 2021
Released by Pias
Tracks : 10 / Length : 36:31.09
Digipack

Onward to the wall - A place to bury strangers - 2012
Released by Dead oceans
Tracks : 5 / Length : 16:43:29
digipack, ep

Opacities - Sikth - 2015
Released by Peaceville
Tracks : 6 / Length : 27:42.43
Digipack, mini-album

Opiate - Tool - 2003
Released by Tool dissectionnal
Tracks : 6 / Length : 26:56.45
EP, reissue

Option paralysis - Dillinger escape plan (the) - 2010
Released by Season of mist
Tracks : 10 / Length : 41:33:29

Option paralysis - Dillinger escape plan (the) - 2010
Released by Season of mist
Tracks : 11 / Length : 44:23.73
Digipack, limited

Opus contra natvram - Behemoth - 2022
Released by Nuclear blast
Tracks : 10 / Length : 43:23.48
Digibook, limited

Opvs contra natvram - Behemoth - 2022
Released by Nuclear blast
Tracks : 10 / Length : 43:23.48
Digibook, limited

Oracular spectacular - Mgmt - 2008
Released by Columbia
Tracks : 10 / Length : 40:22:08
digipack

Orchid - Opeth - 2016
Released by Spinefarm
Tracks : 8 / Length : 71:50.04
Digipack
Reissue from 1995

Ordinary corrupt human love - Deafheaven - 2018
Released by Anti-
Tracks : 7 / Length : 61:39.56

Orga - Sum of r - 2017
Released by Cyclic law
Tracks : 11 / Length : 58:04.42
Digipack
2 copies

Origin of symetry - Muse - 2001
Released by Taste media
Tracks : 11 / Length : 51:43:67

Origin(s) - Anasazi - 2008
Released by N/A
Tracks : 10 / Length : 60:28.00

Original album collection - Architects - 2014
Released by Century media
Tracks : 12 - 10 - 11 / Length : 41:10.44 – 39:15.36 – 41:28.11
Slipcase, limited, compil
Hollow crown, The here and now, Daybreaker

Original album series - Faith no more - 2011
Released by Warner music
Tracks : 11 - 14 - 14 - 12 - 10 / Length : 55:25:05 - 61:57:50 - 56:47:47 - 43:04:50 - 51:03:60
digipack, compil
cd1: The real thing / cd2: Angel dust / cd3: King for a day fool for a lifetime / cd4: Album of the year / cd5: Live at the brixton academy

Original karma - Silmarils - 1997
Released by Murrayfield
Tracks : 11 / Length : 44:12:02

Origins - God is an astronaut - 2013
Released by Revive
Tracks : 12 / Length : 53:09:52
digipack

Origins - God is an astronaut - 2013
Released by Rocket girl
Tracks : 12 / Length : 53:09.52
Digipack

Other arms - Redjetson - 2009
Released by Gizeh
Tracks : 10 / Length : 59:59.41

Other people's songs - Erasure - 2003
Released by Mute
Tracks : 12 / Length : 41:19:48

Other's people problems - Breton - 2012
Released by Fat-cat
Tracks : 11 / Length : 41:40:63
digipack

Our love to admire - Interpol - 2007
Released by Capitol
Tracks : 11 / Length : 47:03:50

Out of reach - Lizzard - 2012
Released by Klonosphere
Tracks : 10 / Length : 44:05.67
Digipack

Output negative space - Enablers - 2006
Released by Neurot
Tracks : 9 / Length : 33:22.64

Over the frozen seas - When icarus falls - 2009
Released by Get a life
Tracks : 3 / Length : 31:04.13
Digipack, ep

Overdramatic - Noam - 2016
Released by Symbolic interaction
Tracks : 10 / Length : 70:43.73
digipack