Prime universe
(Capcom's primary storyline)
Further notes

Proto Tyrant (T-001 Model) was an experimental subject which served as the prototype for the later Tyrants. Despite its primitive design in comparison to later B.O.W.s, it nonetheless demonstrated the "bare ferocity" that earned its series the name "Tyrant".[2][excerpt 1]


Aimed at developing the "ultimate life form", the T-001 was developed alongside the "finished product", T-002. During the experiment, the t-Virus' negative effects were found to be too potent, resulting in such deformities as the skin essentially "exfoliating". This led to the decision to discontinue the Tyrant's development.[2]

While the T-001 was scheduled to be destroyed, it was released during the incident in the Arklay Mountains when the Raccoon City Underground Laboratory 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. However, its "t" regenerative capabilities were underestimated, and the Tyrant broke through the emergency shutter and confronted Rebecca and Billy a final time in the water treatment plant. They managed to fight off the beast and defeated it again.

After a short while, the Tyrant quickly regenerated and managed to reach the Marshaling Yard above the underground laboratory through the train elevator during a fight with Albert Wesker, shortly after Rebecca abandoned it. Its regenerative capabilities helped it recover, and it attacked Wesker again before finally being killed for good.



  1. Excerpt from biohazard 0 KAITAISHINSHO, page 080:
    "究極の生命体を目指して開発が進められ、 圧倒的な戦闘能力と命令を遂行する知性を兼ね備えた人間ベースB.O.W.の完成型として"洋館事件"以降は量産にも成功することとなるタイラント——その完成間近のプロトタイプであり、 投与されたt-ウイルスの作用が強すぎたためか、 思考態力の発達が見られず育成の中止が決定された。外皮の腐敗が著しく、 背面は脊椎の一部が露出するほど皮膚がはげ落ち始めているが、身体機能や耐久性の点では実用化したタイラントと比べても見劣りせず、 廃棄処分を受けながらも信じがたい生命力を発揮して活動を再開した。馬上槍を思わせる石腕の巨大な爪に加え、 左手にも形状変化の兆候が見られることから、 のちの量産型が生命危機に瀕した際にリミッターを解除して移行する暴走モード(スーパー化)に近い、 極めて不安定な状態であると推測される。むき出しの凶暴性は、 むしろ完成品よりも"暴君"の名にふさわしい。"
  1. CAPCOM Bio0
  2. 2.0 2.1 Hamamura (ed), KAITAISHINSHO, p.80