- One Machine (Thrash Metal-United-Kingdom)
- Of Machines (Post Hardcore-USA)
- Ocean Chief (Sludge Doom-Sweden)
- Of Man and Machine (Technical Death-USA)
- Ocean Within (Deathcore-Finland)
- Oceanpath (Symphonic Metal-Latvia)
- Oblivion Machine (Cyber Metal-Russia)
- Ocean Wake (Death Doom-Finland)
- Oceangrave (Death Doom-Italy)
- Of Man Not Of Machine (Experimental Metal-USA)