- God Serpent (Black Metal-Bulgaria) - Outro nome : ex-Ork
- Ork (ESP) (Black Metal-Spain)
- Ork Bastards (Thrash Black-Russia) - Outro nome : Örk Bastards
- Orkan (Thrash Black-Norway)
- Orkenkjott (Progressive Metal-Norway) - Outro nome : Ørkenkjøtt
- Orkhestre Khaotique (Dark Ambient-Belgium)
- Orkhys (Symphonic Heavy-France)
- Orkidean Theory (Nu Metal-Argentina)
- Orkkid (Folk Metal-Serbia)
- Orkrist (Epic Black-Slovakia)
- Orkum Morari (Gothic Metal-Germany)
- Orkus (Melodic Death Black-Germany)
