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Mainstream universe
(Capcom's primary storyline)


Morpheus, about to inject himself with the virus.

The t+G Virus was an experimental mutagenic virus developed by the European branch of the Umbrella Corporation.


After HUNK retrieved a sample of the G-Virus from William Birkin in Raccoon City, Umbrella proceeded to experiment with it, and eventually decided to splice its antibodies with the t-Virus - it was theorized that a successful merger would give infectees strong bio-electrical properties.[1][2]

The earliest known version of the virus - Ver.0.9.1. - failed in the R&D team's goals, having been unable to give a Tyrant the expected bio-electrical abilities. The Tyrant, in relation to the virus version, was designated "Tyrant 091". The later, updated virus - Ver.0.9.2. - appeared to be successful when reported on, though no human test subject of the desired phenotype was available at the time.[1]

In September 2002, the only known sample of this new version was stolen from the Paris Laboratory by Morpheus D. Duvall, a former Umbrella employee desperate to take revenge on Umbrella for using him as a corporate scapegoat for the Mansion incident of 1998.

Properties and Mutations

The nature of the virus caused the host to gain defensive electrical properties, amplifying the body's electromagnetic field so that it developed a high voltage, allowing it to repel most projectiles. It also increased the host's strength and speed and allowed the host to retain full intelligence, like the t-Veronica virus, due to the fact that it does not damage the brain or diminish higher brain functions.

An early agent of the virus known as "V.0.9.1." was administered to a test subject, which was named "Tyrant 091". This Tyrant was deemed a failure, as it failed to produce bio-electrical properties and had very low intelligence. A newer agent known as "V.0.9.2." was stolen by former Umbrella employee Morpheus D. Duvall, who later administered it to himself, resulting in full adaptation with the aforementioned bio-electrical properties and no loss of intelligence, unlike Tyrant 091.

In the case of Morpheus, it also seemed to give him a more feminine shape, as well as apparently altered his voice to sound more feminine, possibly a side effect of the two viruses.


The "Charged Particle Rifle" was the only known weapon able to damage an organism infected with the t+G Virus. It was developed at the Atlantic Waste Disposal Facility by followers of Morpheus, and was later used by Bruce McGivern to pierce Morpheus' electromagnetic field after he had injected himself with the virus. After sustaining enough damage, the genetic structure of the fused virus broke down, allowing the G-Virus to begin mutating at an alarming rate, causing Morpheus to become a giant, unrecognizable blob of flesh and empty mass.


  1. 1.0 1.1 Capcom. Resident Evil: Dead Aim. (Capcom). File: Research Report 220329.
  2. 無題ドキュメント (Japanese). Capcom. Retrieved on 2012-08-20.

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