In this section of the guide you can find out where to find all the Infusions you will need to increase Booker's Shield, life or mana bar. In addition, by collecting all of them you will unlock the trophy/object INFUSED OF GREATNESS.
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SECTION 4 - COMSTOCK CENTER ROOFS
-OPTIONAL MISSION- You'll have to open the casket in the Lansdowne residence, just before the Montgomery residence. The casket is located in a room on the lower floors, you will find the key later together with the next Infusion.
-Get into the brotherhood of crows, get into the main hall and defeat the hooded. You will find the infusion on the table above the stage.
SECTION 5 - MONUMENT ISLAND ENTRANCE
-Pick up the Skyline with your hook and as you pass under an arch, jump on the platform on the left so that you enter one of the 2 pylons of the arch. Enter to find the infusion in a small room on the right.
SECTION 6 - MONUMENT TOWER
-At Monument Island, behind the desk shown in the photo.
SECTION 7 - BATTLESHIP BAY
-After the ambush at the ticket office, continue and go to the back of the ticket office to access and take the infusion.
SECTION 8 - SOLDIER'S FIELD
-Have Elizabeth break down the door on the left, right at the start area. -Mm-hmm. You will find the brew on a desk inside.
-OPTIONAL MISSION- Arrive at the square with the enemies, enter the building on the left and take the cipher from the mouth of the cannon. Then enter the saloon to the right of the square and enter the first bathroom to translate the red writing on the wall. Now enter the second bathroom and pull the hat from the picture. Go down to the secret basement to find the infusion.
SECTION 9 - HALL OF HEROES
-When you arrive in the area where you will have to fight with Slate, who will throw you the electric traps from a balcony, enter the door on the lower left which was previously closed. You will find the brew on the desk
-After Slate's ambush, enter the room from which the enemies came out to find the brew at the bottom of the table.
SECTION 10 - RETURN TO THE HEROES' HALL SQUARE
-On a table, inside the First Lady's blimp. -Oh.
SECTION 11 - FINKTON PIER
-As soon as the chapter begins, enter the building on the left and look between the desks in the picture.
SECTION 12- FINKTON CENTER
-Break in the door shown in the picture, in the employment office at the beginning of the chapter.
SECTION 13- THE GOOD TIME
-In the large room where you will be tested, at the bottom right, enter the bar at the corner below the stairs to find the brew on the counter.
-OPTIONAL MISSION-This collectible is located in FINKTON CENTRE but you will first have to go down into the basement of the GOOD TIME and take the cipher that is on a crate in the second room with the enemies under the stage.
Now go back to Finkton Centro and go to the left corner of the entrance to PIAZZA DELLO ZELO.
You'll arrive on a wooden pier where you'll have to break in a door. When you enter the watchmaker's shop, use the cipher to translate the symbols on the wall and find out how to set the hands in the big clock next to it. The infusion is in the safe.
SECTION 14- SHANTYTOWN
-When you get to the initial trivia, turn left and look at a stall at the back.
SECTION 15- POLICE STATION DEPOT
-In the big hall with the enemies, go up the stairs on the left and enter the first door on the left. Break through the armory door to enter and find the infusion.
-OPTIONAL MISSION- In the large hall with the enemies, go upstairs and enter the offices on the left to find a blue trunk. The key is on a barrel, in the basement of the Graveyard Shift, the bar at the beginning of the SHANTYTOWN section.
SECTION 17- THE FACTORY
-After you see the end of the Fitzroy, go to the door on the left before you get on the blimp.
SECTION 18- EMPORIA
-Get into the first building, use the picks on the gate on the left. -Mm-hmm. The infusion is located at the bottom in a basin.
-OPTIONAL MISSION-When you take the Voxaphone on the lower floor of the bookshop, you will discover that at The Salty Oyster ( the restaurant you should have already broken into in this section ) there is a secret button under the till. Press the button, enter the room that will open and collect the brew from the table together with the Vigor "Return to sender".
SECTION 19- EMPORIA CENTER
-Get into the commercial district and, after the arsonist's fight, pick the first lock you find to get into the photo bottle.
-Upstairs in the Lutece lab, on the desk in the bedroom.
SECTION 20- THE BANK
-OPTIONAL MISSION-Before you can take this infusion, you must enter the commercial district from the point where you also enter the bank. And go down to the foundations of the house, immediately in front of the district entrance, to take the cipher. Now enter the bank and continue until you find yourself in front of the huge security door. Go to the left and continue to the end, have the sign shown translated into photos and you will have access to the secret vault.
SECTION 21- HOUSE OF COMSTOCK
-After you save Elizabeth from the doctors, break down the back door in front of the elevator.