(Capcom's primary storyline)
The Tyrant-Armored Lethal Organic System, or T-A.L.O.S. (テイロス teirosu ), was biologically engineered by the Umbrella Corporation to be the ultimate Bio Organic Weapon. It is a computer-controlled powered assault armour grafted onto the body of a Tyrant, T-011.
Following the successful creation of the Tyrant-002, the Umbrella research team stationed at the Umbrella Lab in the Arklay Mountains found themselves well on their way towards a marketable humanoid Bio Organic Weapon. With the Tyrant programme progressing smoothly, a proposal was made to begin developing a new, highly advanced bio-weapon that would overcome the one major flaw in existing Tyrants: lack of control. Most Tyrants are prone to sudden cellular mutations that can result in the halting of functionality, impairment of judgement, and the various other detrimental conditions.
In order to enable safe transport and deployment, a more stable solution was essential. Umbrella's 6th Research Lab in Europe had already discovered one method of control by using an organic parasite, and their "Nemesis Project" would reach completion in time for deployment in Raccoon City. The Arklay team, however, conceived of an even better solution by using chip connections to brain cells. This method allowed bio-weapons to be remotely controlled by a supercomputer like the Red Queen.
Not satisfied with just superior control, the Arklay team wanted a bio-weapon that could match the firepower of heavy military hardware. Normal Tyrants boasted a combat prowess and survivability beyond the best trained combat troops, but they were only capable of successfully deterring one military division. When facing armoured fighting vehicles or military-grade helicopters, a Tyrant's kill ratio begins to falter. The Arklay team's solution was to arm a Tyrant with specialized combat firepower and armour. Most Tyrants were unsuited for weaponry, as it would only hinder their two strong points – motor performances and response reflexes. However, the use of enhanced armour modules, internal reinforcement implants, long-distance homing weaponry, etc. preserved the natural abilities of the Tyrant while granting incredible firepower.
The result of this intensive research was T-A.L.O.S.
The T-A.L.O.S. was intended to be the ultimate superior bio-weapon, but before it could be completed, development was interrupted by an outbreak of the t-Virus perpetrated by former Umbrella researcher James Marcus. Realizing that the Spencer Mansion facility's days were numbered, Umbrella founder Oswell E. Spencer personally ordered his most trusted enforcer, Sergei Vladimir, to recover the T-A.L.O.S. prototype (formerly designated as T-011) so that its research would not be wasted. Sergei was successful in his mission, and the prototype was safely brought back into Umbrella's hands before the Mansion was destroyed.
Following the outbreak in Raccoon City, the Umbrella Corporation was forced underground and most of its activities were shut down. The T-A.L.O.S. project was moved to Umbrella's Russian branch - having been recovered from the NEST during the outbreak - which was now the company's last enduring stronghold. There, under the continued guidance of Sergei, the T-A.L.O.S. was completed and tested against a special forces unit, two armoured vehicles, and an attack helicopter. The T-A.L.O.S. outperformed all of them handily, and rumours of Umbrella's new bio-weapon began to spread.
On February 18, 2003, the stronghold where T-A.L.O.S. had been completed came under attack by troops led by Chris Redfield and Jill Valentine. The pair penetrated deep into the facility, and at its very core they finally faced off against T-A.L.O.S., Umbrella's greatest bio-weapon. Despite mutating into a more powerful form, T-A.L.O.S. was killed by the two, and the entire facility laid to waste. Thus, years of Umbrella's most sophisticated research ended in failure, and the company was truly finished.
T-A.L.O.S. uses a Tyrant as a base, while adding remote computer control capabilities via a chip implanted in the brain. Its cardiovascular system is artificially improved, giving it mobility unthinkable in a natural organism. Its body is armoured in a special metallic alloy that not only helps it defend itself from missiles and other projectile fire, but also restrains runaway t-Virus mutation. It has also been equipped with a homing MRL weapon system to allow it to respond to distant targets. The T-A.L.O.S. can use its massive left arm to either sideswipe or crush opponents, and its rocket launcher has a rate of fire similar to a sub-machine gun. Although it is a humanoid B.O.W., it has enough armour and firepower to stand against a tank. After being defeated in this form, T-A.L.O.S. mutates; most of its armour and long-range weapons detach, its legs disappear, and it anchors itself to the overhanging Red Queen. This form begins to utilize more physical attacks, such as flinging pieces of the ceiling with robotic claws mounted on tentacles. Its arms have mutated into massive appendages ending with enormous claws, allowing T-A.L.O.S. to swipe at and crush its enemies.
T-A.L.O.S. takes its namesake from Talos, a giant made of bronze that Zeus sent to Crete to protect the noblewoman Europa. In mythology, it is said to circle the island's shores three times each day to patrol her. In the tale of Jason and the Argonauts, it threatens Jason's ship, the Argo, by throwing rocks from the shores. It was slain by Medea, a sorceress member of the Argonauts, by driving it mad with drugs and deceiving it into removing a bronze nail that held its single vein shut, thus making it bleed to death.
- Resident Evil: The Umbrella Chronicles, Talos Project Proposal
- Resident Evil: The Umbrella Chronicles, Sealed Letter to Sergei Vladimir
- CLUB96 article
- Resident Evil: The Umbrella Chronicles, T-A.L.O.S. Simulated Battle Results
- Resident Evil: The Umbrella Chronicles, T-A.L.O.S. Notes
- Wikipedia article on Talos