Full list of all 48 The Walking Dead achievements worth 600 gamerscore. It takes around 1-2 hours to unlock all of the achievements in the base game.
The base game contains 8 achievements worth 100 Gamerscore, and there are 5 DLC packs containing 40 achievements worth 500 Gamerscore.
Completed Episode 1: A New Day.
Chose between friends.
Finally reunited with your brother.
Met a girl at the end of her rope.
Chose between two sons.
Found help and are now responsible for a little girl.
Escaped from Sandra and met Clementine.
Freed from your cuffs, but...
Dealt with a stranger caught in a bear trap.
Reacted to the surprise attack on Katjaa.
Had a showdown with a crazy woman.
Discovered the source of the food.
Chose sides, but was it worth it?
Took out Danny and kept his gun.
Watched Andy die.
Completed Episode 2: "Starved For Help"
Chose who needed you more.
Made it out of the train station with precious cargo.
Completed Episode 3: "Long Road Ahead"
Provided some tough love.
A friend sets out in search of home.
Left the Motor Inn to the bandits.
Temporarily defused a tense situation.
Chose a stranger's fate.
Arrived in Savannah.
Searched River Street.
Discovered the refugees in the sewer.
Returned to the manor with medical assistance.
Infiltrated the fallen district.
Made a merciful decision regarding someone's fate.
Awoke to find Clementine gone.
Completed Episode 4: "Around Every Corner"
Completed Episode 5: "No Time Left"
Made it out, but…
Confronted a stranger.
Arrived at your destination.
Sacrifices were made.
Broke out of the manor house.
Returned to the attic.
Arrived on the hospital roof.
Separated from your best friend.
Found an old friend.
Reaped what you sowed.
Escaped from the prison bus.
Won a game of Rock/Paper/Scissors.
Chose what was best for your younger sister.
Survived Nate.
Left someone important in a corn field.