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 Artifact – Boat Note – After washing up to shore, make your way to the large blue boat. There is a door on this boat that leads to two collectibles, one of which is this note.

 Comic Book – Antiparticles – Same as above.

 Firefly Pendant – Josh Scheffler – Lower section of the same boat you got the previous two collectibles.

 Firefly Pendant – Robert Righetti – After entering the sewer tunnels, there will be a small opening on the right wall with water coming out of it. Climb in there and take that to the end and look to the left and near some parts will be this pendant.

 Artifact – Sewers Note – A little further into the sewers, there is a gate sthat is locked. Ellie can climb through a nearby grate and open the door from the otherside. In this area on the table is the artifact.

 Firefly Pendant – Eddie Fuentes – You will come to a flooded room with a yellow car crashed with the rear of it sticking out of the water. Jump into the water and swim down and right next to the hood will be the pendant.

 Artifact – Trading Note – From the room with the yellow car in the water, you will swim to another area after the gate is raised. In this next area you will need to drop a pallet in the water. In this area is a door that leads to a room and next to a mattress will be this artifact.

 Toolbox #3 – You will come to a spot where you need to get Ellie over some water using a pallet to turn on a generator. When you reach the other side and climb out of the water, follow the path and to the left will be a room with the tools.

 Training Manual – Bomb:Containment – While traveling through the sewers, you will set of a noise trap. Just a bit further from there on a shelf in your direct path with be this training manual

 Artifact – Rain Catcher Note – After your next encounter with a clicker and a few of his buddies, there will be a doorway along the right wall that leads to a room with a note on the counter.

 Artifact – Cornered Note – Just a bit past the previous note, you will find a door you can enter on the left. Next to a body in this room is an artifact.

 Artifact – Kid’s Drawing – Just after getting split up from Ellie, you will come to an area with a ton of infected. Just past that will be a nursery and there will be artifact on a bookcase on the right side.

 Artifact – Looting Note – After making it out of the sewer section you will come across a neighborhood with several house you can enter. This will be in a second floor bedroom in the first brick house you come across on the right.

 Conversation #22 – In the neighborhood, walk down the street and where the road curves, there will be a house with the words “Will Shoot on Sight” painted on the side of it. This is the trigger for another conversation.

 Conversation #23 – Just a bit further there will be an ice cream truck. Approach this and you’ll be given another optional conversation.

 Training Manual – Melee: Techniques – In the same neighborhood, this is next door to the house with the open garage with the workbench. Climb the stairs and on top there will be a rope you can pull to reach an attic. Send Ellie up there and she will bring you this Manual.

 Artifact – Father’s Note – In the same house as the Training Manual, It’ll be in the master bedroom on the second floor

 Comic Book – Messenger Particle – This, and the next two items, are in the house just to the right of the one with the Father’s note and Training Manual. The Comic Book is located on the second floor, on a toilet.

 Artifact – Survivors Note – Same area as above but it’s on a desk instead.

 Artifact – Matchbook – Located on the third floor of the same house as the previous two. It’s on the desk right as you come up.

 Conversation #24 – The final house on this street in the Suburbs has the final optional conversation. Clear the house of the other three collectibles listed above, and when you make your way back downstairs the kids should be playing darts. When they are done, pick up a dart and toss it to earn this

 Firefly Pendant –Matthew White – This is in the side yard of the house you’ve just cleared out of collectibles. Above the swings, very well hidden, is a pendant that you can either shoot down or use a nearby brick to toss at it.

 Joke Location #5 – This is in the housing area after the sewers in The Suburbs level. There are three things you must do to activate this so you may have to backtrack a little. You need to initiate conversation at the house at the bend in the road with the warning spray painted on the side. After that, turn around and there will be a exposed kitchen on the house across the street. Enter there and hear a tale about a BBQ. From there, you’ll need to the conversation at the ice cream truck. Once that’s all complete, go to the end of the road and wait.

Watch full Grounded mode difficulty walkthrough with collectibles

Select a Chapter/Guide

Chapter  2 – Quarantine Zone (note, there are none in Chapter 1)
Chapter 3 – The Outskirts
Chapter 4 – Bill’s Town
Chapter 5 – Pittsburgh
Chapter 6 – The Suburbs
Chapter 7 – Tommy’s Dam
Chapter 8 – The University
Chapter 9 – Lakeside Resort
Chapter 10 – Bus Depot
Chapter 11 & 12 – Firefly Lab and Jackson

All 37 Optional Conversations
All 5 Ellie Joke Conversations
Toolbox Locations
Shiv Doors