To crouch in Brother’s Vow on Roblox, use the C key on keyboard, or the B button on controller. A public Roblox controls guide also notes that crouching is available through built-in controls, and a recent post about Brother’s Vow specifically says to press down the left joystick on controller to crouch.

Controls

  • PC/Keyboard: Press C to crouch.
  • Controller: Press B on Roblox’s default controls, though Brother’s Vow players have also reported crouching by pressing down the left joystick.

Quick fix

If crouch is not working, try:

  1. Rejoining the game.
  2. Checking whether the game has changed the default control binding.
  3. Testing keyboard and controller input separately.

Note

Different Roblox games can remap controls, so Brother’s Vow may behave slightly differently from the standard Roblox default.