This The Last of Us 2 Walkthrough for Chapter 8: Seattle Day 3 – The Confrontation involves everything finally coming to a head. There are 0 collectibles and a lot of drama.
Head to the ladder hanging outside, boost Lev into it and climb up. Interact with the window to open it. Check out the photos ahead and continue down the stairs and a cutscene will play.
Chase Ellie behind the stage.
Back Stage Phase 1
Don’t attack Ellie head-on. You’ll need to attack her from behind so move throughout the cover and use your heading to get the upper hand. You’ll see a Strike prompt and that’s when you can attack.
Back Stage Phase 2
Immediately change your cover because Ellie will just walk up to you and gun you down otherwise. In this area, Ellie will plant Trap Mines. Listen to detect them and move around cover to get the upper hand once again. Watch out because moving through the danging chains will create enough noise for Ellie to detect you. You can use a throwable to stun Ellie and Strike her here as well. Just be careful not to run into any traps.
A cutscene will play and lead into the next section: The Farm.
Source: IGN.com The Last of Us 2 Walkthrough Chapter 8: Seattle Day 3 – The Confrontation