This is a guide for the first area: The Quarantine Zone in The Last of Us: Part 1. It’ll navigate you through the necessary steps to getting outside the wall.
Where To Find The 20 Years Later Optional Conversation
After the unfortunate events that took place in the Prologue, you’ll fast forward 20 years into the future and meet Tess who’s not only a partner but a friend. Here you’ll discover that someone named Robert is trying to cause issues for Joel and Tess, so we need to stop him!
Once the scene has come to a close, follow Tess through the alley until you get outside. Avoid the guards to prevent being killed, then approach the couple standing over to the right side of the street and press to engage in an optional conversation. You can also stand near armored vehicles and listen to the security guards.
Return to Tess and walk through the street until you reach the checkpoint, then a scene will play out. Unfortunately, an explosion happens just before you pass the gate, so you’ll need to find an alternate route to get outside.
How To Get Outside The Wall
Once you regain control of Joel hold L1 to sprint and follow Tess until you enter a building. After you are both safe, Tess will give you your first Health Kit, so press up on the D-Pad to equip it, then hold R2 to restore your health. Next up, follow Tess through the building until reach the back left room, then help her move a cabinet out of the way. Finally, enter the tunnel to finish the first part of The Quarantine Zone.