Here is the full list of all 40 The Walking Dead: Season Two (Windows) achievements worth 1,000 gamerscore.
Arrive at the shore.
Find a campsite.
Meet new people.
Arrive at the cabin.
Get what you need.
Take care of yourself.
Head out with the group.
Complete Episode 1: "All That Remains"
Help someone through a difficult time.
Talk to a stranger.
Leave the cabin.
Find a way across the water.
Meet someone on a bridge
Make it to the ski lodge.
Settle things with a new friend.
Complete Episode 2: "A House Divided"
Arrive at your new home.
Witness a murder.
Make it through your first day.
Commit larceny.
Get beaten down.
Invite some friends into the compound.
Give what you got.
Complete Episode 3: "In Harm's Way"
Get separated from the group.
Learn new survival skills.
Return to the meeting place.
Reach the museum.
Find the Observation Deck.
Survive the attack.
Get back on the road.
Complete Episode 4: "Amid the Ruins"
Make it out alive.
Take a breather.
Stop for the night.
Reach the other side.
Make it through to morning.
Reach the terminus.
Find your way through.
Complete Episode 5: "No Going Back"