The t+G-virus was an attempt by the Paris branch of Umbrella Corporation to fuse the t-virus and its antibodies with the G-virus in a bid to find a new way of producing B.O.W.s through limiting the volatile nature of the G-virus. It was hoped that mutations would be inhibited from going out of control, whilst still creating a powerful B.O.W. which would have added the benefit of generating an electrical field around itself for both offensive and defensive purposes. A sample was stolen from the Paris Laboratory by Morpheus D. Duvall.
History
In an attempt to merge the two viruses together and correct the volatile nature of the G-virus, Umbrella developed a method of fusing the G-virus with the t-virus, along with existing t-virus antibodies. A byproduct of this fusion was an electrical current, which rendered the subject immune to conventional weapons. The first attempt at implementing the virus agent "V.0.9.1" into an organism was largely unsuccessful. A Tyrant was created, but it did not possess the electrical current and featured a critically exposed weak point. It also sprouted tentacles in the place of claws and its body was heavily decomposed. This Tyrant was given the designation of "Tyrant 091".
The second "attempt" was a resounding success. After former Umbrella researcher Morpheus D. Duvall was injured in a grenade blast on the hijacked Spencer Rain, he injected himself with the t+G-virus agent "V.0.9.2" stolen from Umbrella's Paris facility in a bid to prolong his life. Unlike the first tyrant, Morpheus (pre-emptively given the "092" designation) had no ill-effects. The electrical current was present, rendering him invulnerable to conventional weaponary. He also grew claws, as typical of most Tyrants. Speed and agility were also improved along with a vastly improved nervous system, giving him the ability to dodge most attacks at a frightening speed.
After the subject sustained enough damage from the specially designed "Charged Particle Rifle", the virus began to break down from it's harmonised fusion as the G-virus began to override the t-virus causing striking mutations at an alarming rate. This was due to the Charged Particle Rifle having broken down the viruses at the genetic level, allowing the G-virus to mutate uncontrollably with all of the damage sustained. Morpheus began to change at an alarming rate. In the space of a few minutes, he became a gigantic blob of mass and flesh. After he sustained even more damage, the effects of the G-virus began to take place at an even faster rate, becoming even bigger than previously to the point where his own body exploded.