As found in Sniper Elite Nazi Zombie Army 2, find the doll in Purgatory, outside the last safehouse which is a train wagon. The doll is next to it, in the baby carriage with with a PP-SH 41.
Start "Terminal", the fourth mission of the second campaign, under the Cadet difficulty setting and with spawns at one player. After clearing the ramp leaving the starting area, you will encounter a Fire Demon in the open. Shoot only when he is exhausted from shooting a fireball, and try to get headshots. You should be able to kill him with three or four shots. Reload from the checkpoint and repeat the process as many times as needed. Note: To the left of his spawn point is a Summoner that can also be killed each time for another achievement. Each cycle should require about two minutes. It is easier with a partner that can take care of the random enemies in the area. If done solo, kill the Fire Demon quickly and eliminate the small number of suicide zombies that charge you.
Play "City of Ashes" in the third campaign. When you help defend the HQ, you will be cleared to the hospital. Once outside the building, save the doctor who is crying for help in front of the gates. The zombie will appear from the right. While exploring the hospital, you will enter a room where a summoner is lying down with skeletons acting as his doctors. On the left are human remains and the message "You can still save him" will be on the wall. Meet the doctor you saved earlier and take his bag. Return to the room with the summoner and interact with the human remains. A man will appear and "We can still fix him" will be earned. Note: After saving the man, a gold bar will appear on the table.
Survivors begin appearing in the third campaign. A lot of them are featured in "City of Ashes", some behind bars in the train in "Freight Train of Fear" (and one hidden in a crate in the beginning), and at least four of them in "The Keep". Killing a survivor will incur a penalty of -100 points.
Destroy the flying skulls. Consider using a shotgun to do this quickly, especially when playing solo. Shoot at the Occult General's head once. Repeat the process three times. Occult Generals can summon zombies and skeletons. However except for in Tower of Hellfire, each time he is wounded the enemies will disappear.
Use the shotgun as your secondary weapon when swarmed and throw some grenades. Do not attempt this with a rifle going for headshots unless you are skilled.
The first Heavy Armor Zombie is encountered in "The Keep". They can also be found in "Army of Darkness" and "Horde". An easy way to shoot their head is from behind. In the beginning of "The Keep", a fence will shut down and kill zombies. Behind it are several Heavy Armor Zombies. Some of them only have a partial helmet, leaving the back of their head unprotected. Headshot one of them to earn "Your blood pressure is zero over zero".
There are 60 Bronze Trophies, 2 Silver Trophies, 1 Gold Trophy, and 1 Platinum Trophy.
Complete the following tasks to unlock PlayStation trophy rewards.