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.


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