Tyrant T-001

Tyrant T-001 (also referred to as the Proto-Tyrant), was an experimental subject which served as the prototype for the later Tyrants.

While the T-001 was scheduled to be destroyed, it was released during the Arklay Mountains outbreak when the Raccoon City Underground Research Facility became infested. Shortly thereafter, it met S.T.A.R.S. officer Rebecca Chambers during the events of July 24th in the B4F Turntable Room, and while classified as a failure, it was nonetheless a powerful opponent. Rebecca managed to defeat it after a long battle, and then resumed her search for Billy Coen.

After a short while, the Tyrant quickly regenerated and broke through the emergency shutter. The Tyrant confronted Rebecca and Billy again in another area a short time later. They managed to fight off the beast and defeat it again.

However, its "t" regenerative capabilities were underestimated by both Rebecca and Umbrella, and it managed to reach the Marshaling Yard above the underground Laboratory via the train elevator during a fight with Albert Wesker, shortly after Rebecca abandoned it. Its regenerative capabilities also helped it recover, and it attacked Wesker again before being killed for good.

Unlike its successors, the T-001's spinal column was exposed due to the failed surgery, leaving it extremely vulnerable to small-arms fire from behind. Furthermore, its nervous system was far more primitive than its successors, leading to the T-001s' primitive behavior, lack of coordination, and random twitching. These were the reasons it was scheduled for disposal.