T-A.L.O.S. stands for "Tyrant - Armored Lethal Organic System". It is the ultimate bio-organic weapon, created by the Umbrella Corporation. The Umbrella research team stationed at the Arklay Research Facility originally conceived of the T-A.L.O.S. as their answer to the European Nemesis. Before it could be completed, development was interrupted by the T-Virus outbreak caused by James Marcus. Realizing that the facility's days were numbered, Spencer ordered Vladimir to recover the T-A.L.O.S. prototype so that its research would not be wasted. This was done, and the prototype was safely brought back into Umbrella's hands before the facility was destroyed by Wesker.