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Resident Evil Wiki
Prime universe
(Capcom's primary storyline)

P-ε (P-Epsilon) or known by its development code UMB No.21 is an Umbrella-created toxic gas. It was designed to stop out-of-control B.O.W.s who have broken out. However, when in contact with Plant 43, it causes them to mutate into a more dangerous form, where they create a poison ability. The stated explanation is that some species are able to extract toxins from the gas and use these toxins against threats.[1]

Further notes[]

  • In the original version of Resident Evil 2, P-ε was a highly potent anti-"t" gas that the player may choose to release into the lab. Doing so will remove some enemies in every rooms affected by the gas and weakened any enemies that doesn't. However, if the gas is released in scenario A, Enemies in scenario B will become stronger, namely, all Ivies will transform into Poison Ivies and all Lickers into Enhanced Lickers.
  • In the 2019 remake of Resident Evil 2P-ε is specifically an herbicide.  It must be synthesized and deployed to damage Plant 43 to open up an area of the greenhouse.  Synthesis involves cooling the substance to cryogenic temperatures.[2]

Sources[]

  1. Resident Evil 2 (1998), file: "P-Epsilon Gas Report".
  2. Resident Evil 2 remake (2019), file: "Herbicide Synthesis".
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