G.I. Joe: The Rise of Cobra

Another self-explanatory trophy. In each mission there is at least one Blue Door that can only be opened with a certain class of characters. Ability Doors contain point clusters, files/intel/contacts, or lead to the Storm Shadow battles. If you find an ability door and have the incorrect characters, there is sometimes a Joe Switcher (Pod) nearby. All you have to do is walk up to a door with the proper class character and hold to gain entry. Always use two characters of different classes when looking for files/intel/contacts. This trophy can unlocked on Casual Difficulty. Heavy Class characters include:

Heavy Duty
Gung Ho
Backblast
Destro
Sgt Flash