History of Brig It

Brig It asks you to complete matches, with bonus progress for matches played in a Brig (the objective counts 0/3).

How to complete

The game text does not name the activity. The Brig is a Fallen walker piloted in Heavy Metal, the vehicle-only 3v3 Crucible event (May 9-16, 2025 per The Gamer), so this triumph almost certainly belongs to it, but no source I opened names the triumph, so that is unconfirmed.

1. Queue Heavy Metal from the event node in the Portal.
2. You are assigned a team and vehicle randomly (Drakes with Drakes, Brigs with Brigs), so play several matches to get Brig matches for the bonus progress.
3. Matches are won with 50 points; kills and coin pickups score and pickups repair your vehicle.

The game text says only 3 matches are needed. See also Heavy Metal (triumph).