Chapter 24: The Stadium (Seattle Day 1) contains 4 Collectible Locations in The Last of Us 2 (TLOU2). This walkthrough will guide you to all collectibles in The Stadium 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.
- Coins: 4
- Trophy: Sharpshooter
Video Guide
Coin #1: Alaska
After getting your backpack, you’ll step outside into the stadium. When you do, turn left immediately to find the coin on the floor (before going downstairs in the stadium with your 2 friends).
Coin #2: Maine
From the last location, follow your 2 friends further downstairs the stadium. On your way downstairs, after going through the market, a coin is found where people are doing their laundry (on the bench of 3rd laundry table). Just before reaching the bottom of the stadium where the animals are.
Coin #3: New Jersey
After petting the dog and leaving the dog cage, you’ll enter a dark tunnel with a painting of a wolf on the right. There’s a coin on the floor under the wolf painting. If you go through the next door you can’t go back here. Make a manual save after leaving the dog cage if in doubt.
Coin #4: Vermont
From the last collectible location, go through the next door. There you’ll get weapons from the armory. Now walk straight to the end of the hallway (garage). Ignore the gun range for now. In the garage check the left corner for a locker, the coin is it.
Trophy: Sharpshooter
Enter the Gun Range and beat Manny’s score. Just put all shots in the red center of the target. More than 85 points should win you the Sharpshooter 
trophy.
That’s 100% of the collectibles you can find in Chapter 24: The Stadium in The Last of Us Part II.
For more Collectible Guides, check out the complete The Last of Us 2 Collectibles Guide.
You can also find a Kentucky coin after the truck you’re in catches on fire and you enter the warehouse. Immediately at your right on a table in the corner.
That’s covered in the next chapter, “On Foot”
Should mention that you should make a manual save before you enter the gun range. If you fail you cant redo it right away. Instead you have to replay the chapter. Found this out the hard way.
You can find coin (don’t remember what) in the left before you go to truck after shooting contest.