Bravo-Tango-Seven-Two-Seven-Four, often simply referred to as BT-7274 or BT, is a veteran Vanguard-class Titan of the Frontier Militia's Special Recon Squadron (SRS), piloted by Captain Tai Lastimosa up until his demise at the outset of the Battle of Typhon, as part of Operation: Broadsword. Upon Lastimosa's death and under extreme circumstances, BT linked to then-Rifleman Jack Cooper, and the duo fought their way across Typhon to complete Special Operation 217 and stop the IMC from using its newfound weapon of mass destruction, the Fold Weapon, to devastate the Militia. The Titan ultimately sacrificed himself to destroy the Fold Weapon while protecting Cooper, securing the Militia's decisive victory in the battle. It is possible that his AI somehow still survives, as Jack's helmet flashes in Morse code, saying Jack?
For all intents and purposes, BT-7274 is the deuteragonist of Titanfall 2's single-player campaign, serving as Jack Cooper's right hand and protector.
As a Vanguard-class Titan, BT is designed for operations in hostile territory and behind enemy lines. As such, he is equipped with many pieces of equipment reminiscent of older Titan designs such as the Atlas, with an emphasis on survivability over expendability. This incudes the inclusion of two dashes and a recharging Bodyshield system. The Titan is also designed for versatility and capable of equipping and adapting a number of new loadouts on the fly, being able to equip a VTOL Hover, Laser Core or Particle Wall seemingly without issue. TF2 Achievement BT Prime
Jack Cooper sitting in BT's cockpit.
BT-7274, ultimately an Artificial Intelligence, can also be transferred between different Vanguard chassis' on a whim, via the SERE Kit; an emergency kit containing a Smart Pistol MK6, Data Knife and the AI's datacore for emergency use in the event of the Titan itself being rendered inoperable. This was utilised by Jack Cooper after the destruction of the original BT-7274 chassis, placing the AI in the chassis of FS-1041.
BT is also bound to three primary protocols; while the AI of BT-7274 is evidently self-aware, it is nonetheless restricted to several parameters to ensure mission success. These protocols are;
Protocol One: Link to Pilot Protocol Two: Uphold the Mission Protocol Three: Protect the Pilot
To achieve these goals, BT is equipped with a neural link system, allowing the AI and the Pilot's mind to connect. It is unclear what this system is used for, though it is likely to allow the Pilot's actions to be more efficiently translated into actions taken by the machine - for example, moving the Titan's limbs. While being Piloted, the Vanguard's personality is sublimated, and brought back once the Pilot has been disembarked.
BT is outfitted with various sensor suites capable of long-range detection, biometric tracking and signals intelligence. Two optics units (capable of independent tracking) are present on the Titan's chassis as well as two Acolyte Pods on its back. BT's main optic unit is also capable of displaying holographic imagery. As a Vanguard-class Titan designed for reconnaissance and operations behind enemy lines, BT displays a high degree of intelligence, situational awareness and adaptability to dynamic battlefield conditions. The Titan is additionally equipped with a flamethrower, used to generate Heat Shields and ignite campfires.