| A | B | C | D | E | F | G | H | I | J | K | L | M | N |
| O | P | Q | R | S | T | U | V | W | X | Y | Z |
| O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Artysta | Albumy | Debiut |
|---|---|---|
| Ozzy Osbourne | 86 | 2001 |
| Overkill | 51 | 1995 |
| Outre | 2 | 2013 |
| Orphaned Land | 12 | 2009 |
| Orakle | 2 | 2005 |
| Ophthalamia | 1 | 1997 |
| Opeth | 42 | 2003 |
| Opera IX | 14 | 1993 |
| One Man Army And The Undead Quartet | 6 | 2005 |
| On Thorns I Lay | 7 | 1995 |
| Omnium Gatherum | 7 | 2004 |
| Omega Massif | 5 | 2011 |
| Old Man's Child | 13 | 2005 |
| Old Funeral | 8 | 1999 |
| Odious Mortem | 2 | 2005 |
| Od Jutra | 3 | 2008 |
| Octinomos | 5 | 1999 |
| Occultation | 1 | 2012 |
| Obituary | 20 | 2007 |
| Obdurated | 2 | 2009 |