It Can't Be For Nothing
Collect all the achievements
No Matter What
Complete Part 1
Don't Go
Complete Left Behind
Look for the Light
Find all Firefly pendants
Endure and Survive
Collect all comics
Chronicles
Find all notes and artifacts
Getting to Know You
Engage in all optional conversations
That's All I Got
Survive all of Ellie's jokes
Something to Fight For
Find all training manuals
Combat Ready
Fully upgrade a weapon
Master of Unlocking
Break into every locked door using shivs
Prepared For the Worst
Find all workbenches
Sticky Fingers
Open all safes
Sharpest Tool in the Shed
Find all workbench tools
Build Em Up, Break Em Down
Upgrade and then break one of every melee weapon
Fallen Firefly
Find a Firefly pendant
Self-Help
Find one training manual
Savage Starlight Fan
Find a comic
Geared Up
Craft every item
In Memoriam
Pick up Frank's note after it's discarded
Lights Out
While in stealth, turn off the spotlight generator in Pittsburgh
Waterlogged
Ride the sewer contraption with Henry and Sam
Left Hanging
Leave Ellie hanging after a job well done
Who's A Good Boy?
Pet Buckley the dog
Nobody's Perfect
Play the Jak X game in Left Behind
Brick Master
Win the brick throwing contest
Angel Knives
Defeat Black Fang without getting hit
Skillz
Win the water gun fight
Live Bait
Use bricks or bottles to lure an infected into attacking a human