O.H. | Thrash Metal/Hardcore | Видин/София | 2001 |
O.K. Girls! | Sleaze Rock/Glam Rock | София/Германия | 1989 |
Obsidian Sea | Doom Metal | София | 2009 |
Occultum | Black Metal | София | 2011 |
Oceansoul | Alternative Rock | Бургас | 2023 |
Oceanwide | Alternative Rock | София | 2015 |
Odd Crew | Groove Metal/Metalcore | София | 2008 |
Oddplay | Psychedelic Stoner Rock | Варна | 2019 |
Odium | Death Metal | Плевен | 1992 |
Off | Punk | Плевен | 1999 |
Offroad | Heavy Metal | София | 2006 |
Ogi 23 | Punk Rock/Ska | София | 2005 |
OJ Band | Classic Rock/Country Rock | София | 2002 |
Okupator | Punk/Thrash/Black Metal | Сандански | 2020 |
Old Joe's Anger | Hardcore/Punk | Ловеч | 2004 |
Ollie | Pop Punk | София | 2005 |
Omerta | Hardcore Punk | София | 2005 |
On Our Own | Metalcore/Hardcore | Варна | 2006 |
On Wings | Doom Metal | София | 1994 |
Once | AOR | Бургас | 2011 |
One Day Less | Alternative Rock | София | 2020 |
One Faith | Hardcore | Варна | 2001 |
Ophan | Experimental Math Metal | София | 2006 |
Ophidian Clasp | Metalcore/Deathcore | Перник | 2015 |
Oppressor | Thrash/Death Metal | София | 1992 |
Order Of Splendour | Black/Death Metal | Плевен | 1998 |
Orenda | Black Metal | Враца | 2004 |
Ork | Black Metal | Дупница | 1997 |
Out Of Muse | Pop Rock/Alternative | София | 2021 |
Out Of This World | Raw Black Metal | Варна | 2006 |
Out Of Tune | Hard Rock/AOR | Шумен | 2012 |
Outer Space Experiment | Stoner Metal/Post Rock/Alternative | България/Италия/Франция | 2022 |
Outrage | Hardcore | Варна | 1996 |
Outsider | Thrash Metal | Ямбол | 1990 |
Ovader | Black Metal | София | 2016 |
Overdawn | Metalcore/Deathcore | Русе | 2002 |
OverGame | Progressive Metal | София | 2008 |
Overhook | Alternative Rock | София | 2021 |
Ozone Friendly | Blues Rock | Горна Оряховица | 2012 |