Every Bullet Counts (10)

Use the revolver

In mission three, “Encounters,” you will have to find a keycard in order to progress through a locked door. The keycard is on a desk in a brightly lit room that's connected to the locked door by a small corridor. The revolver is on top of the keycard so you will have to pick up the revolver before grabbing the keycard.

Hold LT to steady the revolver, then press RT to fire.