Here is the full list of all 19 Gang Beasts trophies - there are 19 bronze.
Climb onto the roof of a truck on the trucks stage
Break the cables supporting a container without falling on the containers stage
Break the cables supporting a gondola without falling on the gondola stage
Customize a character on the character customization screen
Break the cables supporting an elevator without falling on the elevators stage
Defeat an enemy wave in the waves game mode
Collide with the seating and the railings on the ring stage
Get inside a shipping container on the containers stage
Escape from the incinerator hazard on the incinerator stage
Concuss an enemy with a diving kick
Pass through three road signs on the trucks stage
Climb to the highest section of the buoy on the buoy stage
Concuss an enemy with a diving headbutt
Escape from the water on the buoy stage
Get inside a truck on the trucks stage
Escape from a grinder hazard on the grind stage
Pass through the orange chute on the girders stage
Win a game of soccer without the opposition scoring in the soccer game mode
Break the stairs on the towers stage