This walkthrough for Seattle Day 3 – Chapter 21: The Flooded City in The Last of Us 2 (TLOU Part II) will guide you through all objectives. It also includes Collectibles and other Items (Artifacts, Trading Cards, Journal Entries, Training Manuals, Workbenches, Safes, Coins, Weapons, Upgrade Parts, Skill Unlock Supplements).
For other Chapters see The Last of Us 2 Walkthrough.
Day: Seattle Day 3
Chapter: The Flooded City
Collectibles:
- Artifacts: 6
- Trading Cards: 2
- Journal Entries: 1
- Workbenches: 2
- Safes: 1
First Stop – The Gate
As soon as the chapter starts, before driving the boat over some sunken and bent fence, you can get out of your boat to pick up 7 Supplements from an open truck to the right side, next to an ambulance.
Now drive your boat over the almost-sunken and bent fences to navigate the city.
Our first stop will be inside the first house we pass through, as there is a Gate that blocks the way. You want to head inside the dark room to the right to get a Trading Card.
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Next, take the stairs to the upper level to take a Journal Entry on the view as well as to pick up an Artifact from a corpse in the corner. After this, push the cart away and to the end of the room where the Artifact was. You can this to climb into a vent with 2 Parts and some supplies.
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Where you took the cart from, crawl under the rubble. When you drop down on the other side, you can open the Safe with the combination 70-12-64 to get 7 Parts & 17 Supplements.
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When you have gathered everything, open the gate with the chain 
and head out.
Second Stop – The Garage
Shortly after driving out of this building, Ellie has to restart the boat’s engine. At this location, take a look to the left to see the Seattle Sleep Warehouse and approach the area.
When facing this building, head around left even further.
Drive towards the dark hole in the building. Inside will be a Workbench as well as 18 Parts, most of them under water to the right side.
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Third Stop – Carthy Hotel
Next, drive along or through the previously mentioned Seattle Sleep Warehouse. At the end, you can see the Carthy Hotel to the right side.
Inside will be a small non-flooded section with a corpse. An Artifact as well as 9 Supplements sit here, waiting to be picked up.
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Fourth Stop – The Monorail
Outside of the Hotel, you can already see some collapsed pillars of the former Seattle Monorail. Inside the last compartment are some collectibles for us.
Walk all the way up until you find a rope. Use it to swing across and into the locked last section of the train. Inside, we will find an Artifact and 17 Supplements.
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Fifth Stop – Kingsgate Brewing Co.
Our penultimate stop is the nearby Kingsgate Brewing Co. You’ve probably already heard some shooting between WLF and Scars, when you approached the train.
The upper floor has an Artifact hanging on the wall, quite close to the staircase. There are also a total of 15 Parts scattered across this floor, mainly around the balcony behind the small gate you can crawl under.
Final Stop – W&B Arcade
After coming out of the Brewery, our final forced stop will be inside an Arcade, which has another gate we need to open. However, we need to unblock the chain first.
On the ground floor, we can pick up an Artifact on a table and 10 Supplements in the kitchen, before heading upstairs. On the upper level, there is a Workbench alongside a total of 29 Parts.
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Still on the upper floor, push the cart towards to opening. However, this results in the floor collapsing and we find ourselves in a fight against a Bloater.
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Once you have taken care of him, open the shutters and climb inside. Before going out, pick up the Trading Card behind the counter.
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Heading up the stairs, take a turn to the right and inside the PC Cafe. There is an Artifact on the wall just to the left of where you enter.
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You can find 12 Supplements behind the bar on this floor before heading to unblock the chain.
Heading Out
Now, we can use the chain on the Gate and head out towards the Ferris Wheel.
The stormy sea will eventually knock us off our boat and we need to swim the last part.
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This finishes Chapter 21: The Flooded City in The Last of Us Part 2. Next is Chapter 22: Infiltration.
For all other Chapter Walkthroughs, check out our full The Last of Us 2 Walkthrough.
You should get the “In the field” trophy when finding the first workbench of this chapter.
Thankfully, I didn’t pause the game, or my PS4 would auto screenshot the pause menu!
It happened to me earlier, when I got the trophy for sightseer 🙁
There’s 2 parts and a craft item in the pc cafe with that artifact, check the desks by the fungus in the far ;eft of the room.
There is a journal entry at the windows near the corpse.
Across from Kingsgate Brewery, on the left hand side is the backside of Carthusian Hotel. You will see a bus parked near the entrance. Climb on top of it, for some regular supplies/ammo, if you need. I think there is a wood plank melee weapon, too!
Carthy*
And by “entrance” I meant, three USA flags.
At the Garage, if you look around in the water, you can find a few extra supplements. Great game all around.