Sleep Tight, Little BB Achievement & Trophy
The easiest way to make BB cry is to fall over. Just run down a hill and trip over some rocks, so that Sam lands on his chest (where BB is attached). BB’s container will start to glow red and you will hear it crying. Hold L1 and press Down + Square to Soothe BB. Slowly move the controller up and down to rock BB up and down. After it stops crying for a few seconds, you will get the “Sleep Tight, Little BB” trophy.