Chapter 22: Infiltration (Seattle Day 3) contains 1 Collectible Locations in The Last of Us 2 (TLOU2). This walkthrough will guide you to all collectibles in Infiltration Chapter in chronological order. Everything that’s needed for trophies and 100% completion is included: Artifacts, Journal Entries, Trading Cards, Coins, Safes, Training Manuals, Workbenches, Weapons, Supplements (Player Upgrades), Parts (Weapon Upgrades).
If you forget a Collectible you can still get it via Chapter Select, so nothing is missable.
- Journal Entries: 1
Video Guide
Parts x9 + Supplements x6
After wading through the first pool of water inside the Aquarium building, you climb up a ladder and then drop down to a dark area. There are 3 Parts on the table, 6 Parts + 6 Supplements in the locker.
Parts x17
After falling out of an air duct you get attacked by a dog (have to tap 
to kill it). Immediately to the left on the next shelf are 17 Parts.
Journal Entry #1
After picking up the Parts, enter the next room and take two left turns. This will lead you to a kitchen area where there’s a blue duffle bag on the floor. Inspect the duffle bag, Ellie will take out a firefly pendant and after you put it away she automatically makes the Journal Entry.
That’s 100% of the collectibles you can find in Chapter 22: Infiltration in The Last of Us Part II.
For more Collectible Guides, check out the complete The Last of Us 2 Collectibles Guide.
A very thorough guide, every essential collectable accounted for, Thankyou.
Possible bug, nothing major though – the 6 supplements in the locker were there even though I had already maxed out all player upgrades. Usually they’ll stop spawning once you’re maxed out, same with parts.
Yup, had the same.