Sirens are scrapped enemies, the only thing that proves their existence is a concept art showed during the Making of Video.
- Even though Sirens were scrapped from the game, their concept art can be found in many places in Battle Out of Hell:
- In Orphanage, on many paintings.
- In Loony Park, on the main entrance sing and exterior walls of Acid Bath.
- In Lab, in the room on top of the Tank.
The Censored version of the Concept art of Siren displayed during the Making of Video.
Painting of Siren in Orphanage.
Painting of Siren on Acid Bath's wall in Loony Park.
Painting of Siren in Lab.
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