Where to Find Infusion #15
BioShock Infinite’s 15th Infusion is in Shantytown, on one of the food stands in the entrance area.
To reach it, head forward through the area until you come to a hut with a sign on it saying “Keep Your Guns. We Need Food.” At the sign, turn left, and you’ll see the Infusion back behind some men in white shirts. Note that when you take it, they will attack you, as it will be considered stealing.
Where to Find Infusion #16 in BioShock Infinite
The next Infusion in BioShock Infinite is in a chest at the Shantytown lock-up, and you’ll need a key from Shantytown proper to open it.
First, head to the Graveyard Shift bar. It can be found down some stairs to the left of the table where you got the last Infusion. Head into the bar, and then head down into its basement through a doorway to the right. Once in the basement, look to your left to find a barrel with some keys on it.
With the keys in hand, head to the lock-up. Head to the upper level of the area, and then make your way toward a room on the left of the walkway. Inside, there’ll be a board showing prominent members of the Vox Populi.
Look to your left to find a small alcove with a chest inside. Use the keys you picked up to unlock the chest, and grab the Infusion inside.
Where to Find Infusion #17
The next Infusion is also in the Shantytown Lock-up area, and is much easier to obtain.
From, head toward the main room and then go up the stairs to your left. Then, turn left again into a small room with a locked door. It’ll take five lockpicks to unlock. Have Elizabeth pick the lock, and then head inside. The Infusion will be on a desk to your right.
Where to Find Infusion #18 in BioShock Infinite
This next Infusion can only be obtained after Elizabeth kills Daisy Fitzroy in the Factory as part of the Main Story.
Once Elizabeth kills Daisy and opens the way into the tower they were in, head inside and turn left through some double doors. The Infusion will be on a table in front of a window looking out at some gears from the tower.
Where to Find Infusion #19
For the 19th Infusion, you’ll need to have reached the Emporia area in the main game.
Head through the area until you come to a room with scalps nailed to a plank of wood. From the plank, head left toward a gate that requires three lockpicks for Elizabeth to unlock it.
Have Elizabeth unlock the gate, and then head through the gate and to the right. This will take you down a hallway, and the Infusion will be at the end of the hallway in a washbasin.
