Ada's Campaign - Chapter 4
Above: All emblems from chapter 4
Emblem 1: After avoiding the first searchlight (or getting caught in it), Ada will grapple up to a higher deck. When you land, turn left to find an emblem.
Emblem 4: As you make your way through the corridors of white goo, a giant face will reach out and attack you. Instead of proceeding through the door directly underneath it, turn left and check behind the consoles for an emblem.