163 collectibles in The Last of Us Part I.
Note to wife
The Note to wife is an optional artifact in the Salt Lake City bus station. Search the luggage along the wall opposite the ladder; it is in an open suitcase along with some crafting parts.
Office recorder
The Office recorder is an optional audio artifact in the university science building. On the third floor, go through the door on the left, then straight into the storage room on the left and take it from the far table by the window.
Oliverio's Firefly Pendant
Oliverio's Firefly pendant is on the bottom shelf of a cabinet below the control room at the hydroelectric dam, in Tommy's Dam. It belonged to Ryan Oliverio.
Optional Conversations
Optional conversations are short side chats you can start with companions or trigger at objects when a prompt icon appears. They never change the plot, but starting every one earns the Getting to Know You trophy in Part I.
Patrol Routes Map
The Patrol Routes Map is a marked-up FEDRA map on the floor at the bottom of the elevator shaft early in The Outskirts. Step off the elevator, turn right and check the litter between the water tanks and a pallet against the fence.
Perich's Firefly Pendant
Perich's Firefly pendant is tucked among rocks behind a guardrail at the freeway exit in the Highway Exit section of Bus Depot. It belonged to Katerina Perich.
Perimeter Note
The Perimeter Note is one of Bill's reminders, resting on top of a drawer in a back room of the Marquis Music Store on Lincoln's main street during The Woods section.
Pharmacist's note
The Pharmacist's note is an artifact in the Left Behind DLC chapter Back in a Flash. It is on the dead pharmacist at the back of the American Princess store; once Ellie takes his key, you can pick up the note too.
Pharmacy key
The Pharmacy key is a required artifact in the Left Behind DLC chapter Back in a Flash. Ellie takes it from the dead pharmacist at the back of the spore-filled American Princess store, then uses it to open the pharmacy's locked back door.
Pills Note
The Pills Note is a reminder Bill wrote to himself, found on the floor at the far end of the room up the stairs and to the left after you drop through the broken fence in The Woods section of Bill's Town.
Plant schematics
The Plant schematics are an optional artifact in the control room of Tommy's dam. You can only take them after the bandit attack: fight back through the control room and grab them from the central table where the two engineers stood earlier.
Power plant map
The Power plant map is an optional artifact in the brick guardhouse outside Tommy's hydroelectric dam. Before you try the dam gate, go into the guardhouse in the corner and look at the wall to find it hanging there.
Precipitate
Precipitate, issue 9 of Savage Starlight, is on the floor of the men's restroom in the bus station during the Highway Exit section of Bus Depot.
Rain catcher note
The Rain catcher note is an optional artifact in a sewer utility room in The Suburbs. After runners and a clicker ambush the group, enter the room on the right and check the table at the back, next to the rain-catching barrels.
Reed's Firefly Pendant
Reed's Firefly pendant is on the floor of a stall in the women's restroom of the Hotel Grand, during the Hotel Lobby section of Pittsburgh. It belonged to Colby Reed.
Righetti's Firefly Pendant
Righetti's Firefly pendant lies in shallow water inside a small duct just past the sewer entrance in The Suburbs. It belonged to Robert Righetti.
Riley's Firefly Pendant
Riley's Firefly pendant starts Lakeside Resort already in Ellie's backpack, but it only counts once you open the backpack and look at it. It belonged to Riley Abel, Ellie's closest friend from Boston.
Rios's Firefly Pendant
Rios's Firefly pendant sits on a toilet in a second-floor bathroom in the Financial District section of Pittsburgh. It belonged to Lucas Rios.
Risk's Firefly Pendant
Risk's Firefly pendant lies at the end of an alley beside the bookstore in the Alone and Forsaken section of Pittsburgh. It belonged to Kazden Risk.
Rohner's Firefly Pendant
Rohner's Firefly pendant is on a desk in an upstairs office room in the Go Big Horns section of The University. It belonged to Alex Rohner.
Safes
Safes are locked caches of supplies that open once you find the note or item with their combination. Opening all of them in The Last of Us Part I earns the Sticky Fingers trophy.
Salon note
The Salon note is an artifact in the Left Behind DLC chapter Back in a Flash. It lies next to a dead soldier in the wrecked salon Ellie crosses on her way from the pharmacy to the crashed helicopter, near a health kit.
Salt Lake Q.Z. map
The Salt Lake Q.Z. map is an optional artifact in the triage area outside the Salt Lake City bus station. Go to the small tent in the far corner where the workbench is and take it from the table on the left.
Sam's robot
Sam's robot is a small toy robot Ellie keeps, an automatic artifact in her backpack at the start of Lakeside Resort. Viewing it in the Artifacts menu makes Ellie speak to it.