"A key engraved with the visage of a hideous monster."
— Item examination

Breeding Rm. Key (飼育室のカギ Shiiku-shitsu no kagi?) is a key item in Resident Evil Zero.


It unlocks the door into the Breeding Room, where several Hunters are kept.


This key can be found in B1 Marcus' laboratory, located on level B1 of the Research Center Laboratory.[1]



  1. Hamamura (ed.), KAITAISHINSHO, p.280.

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