Courthouse fight

Keep the fight moving[1]
  1. 1

    Take ranged firepower

    Use Lancer or Hammerburst; a remote-detonation launcher and spare ammo are available.

  2. 2

    Create room

    Retreat across the arena when it closes in. Squadmates can draw its attention.

  3. 3

    Check emerging threats

    Listen for its call and watch emergence holes for juvies as its health falls.

Avoid a trap[1]
CueMove
Wrist chainsKeep moving; swings can kill or down you.
Closing distanceLeave the Courthouse steps before a stomp traps you.

Which achievement unlocks?

Defeating this Brumak triggers The Bigger They Are….[1][2]

Later campaign encounter · Fort Vigil

Ben-Gun's Act 3 recording shows a Supply Cache in the gift shop before the colonnade fight. Tai draws attention while squad dialogue calls for sustained fire; rifle and Torque Bow shots appear in the capture.[3]

Use the Act 3 Chapter 6 route for the low-wall opening and timestamped encounter sequence. Read this as another encounter's evidence: the Courthouse's layout and scripted hazards should not automatically become rules for every Brumak fight.

Brumaks in Horde Siege

The Coalition also confirms Brumaks in Horde Invasion Events. Their arrival notifies all squads, brings supporting units and applies a temporary modifier that can block extraction or disable Supply Caches. Participating squads share rewards.[4]

September 30 launch tuning increased the difficulty of all Invasions and reduced Weapon Part rewards for participation.[5]

For event objectives and extraction, use Horde Siege. Return to the Act 1 route for the surrounding campaign chapter.

Sources & further reading

  1. Firsthand Brumak encounter: Act 1, Chapter 4 playthrough, screenshots and videoGamer Social Club · Adam “Addy” Stewart · October 1, 2026
  2. E-Day official achievements list (campaign hints)Xbox Wire · September 9, 2026
  3. Act 3 recorded gameplay: Fort Vigil defense, mid-ramp pursuit and late Brumak encounterBen-Gun / YouTube · October 2, 2026
  4. E-Day Multiplayer Deep DiveThe Coalition · July 30, 2026
  5. Emergence Begins — Tomorrow: launch weapon tuning and enemy fixesThe Coalition · September 30, 2026