Scrap is the resource used to purchase and upgrade Emplacements during missions. Pieces of Scrap appear as lit blue Monovision screens scattered on the ground. Scrap is dropped by enemies in varying amounts, and in certain missions a bonus crate of Scrap will be air-dropped from the U.S.S. McKinley. The player can collect Scrap using the Mobile Trench's built-in magnet, or by deploying Collection-type Emplacements.