Payday: The Heist

A Bulldozer is a heavily armored enemy with a big suit with a glass covering the face. It looks like a space suit. They spawn on all heists. On higher difficulties the Bulldozer spawns more often than on lower difficulties.

You have to deal the killing shot on a Bulldozer for it to count as you killing him. The best way to kill a Bulldozer without taking damage from him is to shoot from afar, so avoid shotguns. Shoot at the visor to kill the Bulldozer faster. If you are playing with a friend, then your friend can act as a decoy and take the hits while you kill the Bulldozer.

You are not allowed to be hit by any Bulldozer during the entire heist. So after you killed your Bulldozer, keep your distance from any new areas and group of enemies in case another Bulldozer arrives. You can still be hit by other enemies.

Make sure that you are not playing on easy difficulty when going for this or you won't get the trophy. Choose normal difficulty since there are fewer Bulldozer spawns which means fewer opportunities to being hit by one. You can't get this trophy if you jump into an ongoing heist during online mode, so make sure that you pick an online game that doesn't say 'In Game'.