Sherlock

Find every hidden gold (military-grade) ammo stash tucked away across the game's stations and levels - squirreled into out-of-the-way corners, drawers, bodies and side rooms. There are a lot, and several are very easy to walk past, so a collectible-locations guide is the sane way to get them all. Thorough exploration (see Explorer) covers much of it, and chapter select lets you clean up any you missed.