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Prime universe
(Capcom's primary storyline)
T-Abyss in epilogue.jpg

t-Abyss Virus is a strain of Progenitor Virus which was genetically engineered in 2003 as a bioweapon through alteration of Umbrella's perfected t-Virus. Though samples made their way to bioweapons developers, it has been prohibited from sale on the black market due to concerns of being too dangerous as a weapon product.[1]


The virus' origins lie with the discovery of Abyss Virus, a retrovirus endemic to the Hadopelagic zone of the Kermadec Trench. This retrovirus was found to be present in various fish species, and its genetic material consisted of a double-strand DNA (dsDNA) with genes related to piscean anatomy that allowed for better swimming performance in high-pressure environments.[2] This virus was studied by the Montpellier University of Marine Science, who went on to splice this genetic material into that of the t-Virus which had already made its way onto the black market.[3] It was in the belief of project financier Morgan Lansdale, then head of the FBC, that a major bioterror incident publicly aired internationally would expose it as a military threat, and increase support for American counter-terror operations.[4] When completed, the new virus was used by Il Veltro in a bioterror attack on Terragrigia, the only instance of t-Abyss being used in a major attack. To eliminate them, an outbreak was triggered on their bases, the cruise ships Queen Dido, Queen Semiramis and Queen Zenobia, with the former sinking.

Immediately following the Terragrigia Panic, Queen Semiramis and Queen Zenobia were captured and their laboratories opened up for vaccine research, while teams continued to study the mutations inflicted on the Veltro fighters.[4] Work on the vaccine took place competitively, with Queen Zenobia announcing its success in 2005. Once the research data was transmitted to FBC leader Morgan Lansdale, the mutant test subjects were automatically released from their cells and spread the virus across the ships once more, killing or otherwise mutating the researchers and crew.[4] Following this incident, a sample of the virus found its way to Tricell, a pharmaceutical corporation with a large bioweapons project. Believing the virus to be too dangerous as a bioweapon, Tricell used its position to prevent the virus from making its way onto the black market.[1][excerpt 1]


Mutagenic effects

The Abyss Virus was known to restructure organisms, breaking down fat, strengthening muscles and the skeleton.[5] When the t-Abyss virus was exposed to humans, it proved that the Abyss' genome contained DNA commonly found in marine wildlife. A common mutation experienced by humans is the "Ooze", where the person develops a bloated grey body and suckers. Losing its body water considerably, the Ooze will instinctively hunt down other organisms to replenish themselves.[6]

Ecological effects

Due to its ability to rapidly alter an organism and produce more of the virus, t-Abyss poses a significant threat to the world's oceans. Terrorist group Il Veltro was in possession of a number of vials containing the virus in a red protein media, which was calculated to be able to mutate life in one fifth of the world's oceans. This is explained by the virus infecting plankton, then using their bodies to produce more of the virus, spreading across a wider area in wider numbers, soon reaching larger organisms such as fish, which will mutate and spread the virus further.[5]



  1. BIOHAZARD 6 OFFICIAL COMPLETE GUIDE: "アンブレラ社の終焉が近いと噂されていた頃、 社外への技術流出が密かに進行していた。 2005年のクイーン・ゼノビア事件で使用されたt-ウィルスも、 その流出技術がもたらしたもので、 これはt-ウィルスに、 モンペリエ海洋大研究室の海溝探査で発見された魚数病原ウィルス”The Abyss”を組み合わせたものである。 事件の際に、 t-Abyss感染により変異した生物(人間を含む)が数種確認されているが、BSAAによって事件は解決に導かれ、 それ以降軍事利用された例は報告されていたい。 従来のウィルスにはなかった海水中での感染拡大の危険性があるため、 このウィルスが 世界の闇市場に広がることを阻止できたことは僥倖である。
    2004年のアンブレラ社倒産以降のB.O.W.開発は、 主にトライセル社が主導するものとなる。 だが、 そのほとんどはアンブレラ社の遣産であるt-ウィルス、 G-ウィルス、 t-Veronicaをベースにしたもの、 あるいはロス・イルミナドス教団事件で開発見された寄生生物、 プラーガをベースにしたものでしかない。 とはいえトライセル社の開発能力は高く、 キジュジュ自治区事件の際に投入されたB.O.W.ウロボロスは、 BSAAの一個部隊を壊滅させる戦闘を有していた。 この時期のB.O.W.開発の特徴として、 一部の人間が持つ対ウィルス抗体を利用し、 以前から問題だった暴走の危険性を抑えるというものがある。
    これはある研究者により開発され、 2013年に発生した一連のバイオテロで使用された”ジュアヴォ”をはじめとするB.O.W.も例外ではなく、 その最終的な完成にはC-ウィルス抗体が必要とされた。 2013年のバイオテロのうち東欧で発生したものは、 当時イドニア反政府軍に所属していたC-ウィルス保持者、 ジェイク・ミューラー確保のためであった。"
  2. Resident Evil: Revelations (2012), file: "Researching the Deep-Sea Virus".
  3. Resident Evil: Revelations (2012), file: "Completion of the New-Type Virus".
  4. 4.0 4.1 4.2 Resident Evil: Revelations (2012), file: "Infection Log for Queen Zenobia".
  5. 5.0 5.1 Resident Evil: Revelations (2012), file: "Researching the Deep-Sea Virus".
  6. Resident Evil Recollections, file: "t-Abyss".