To get the "Everybody Gets One" trophy, you have to save Joseph from falling off a ledge in Chapter 6. A couple of minutes into this chapter, you will reach some ruins. On the rooftops is a wooden bridge. You need to climb up there using one of the ladders, and wait for Joseph to be pushed off the bridge by the enemies. Then, help Joseph back to get the trophy. Getting the enemies to push Joseph off the bridge requires some luck. It helps if you wait until the enemies with the gatling guns start shooting at you. If Joseph kills all the enemies on the bridge, you must reload the last autosave to try again.