The Episode 3: In Harm's Way Add-on for The Walking Dead: Season Two (Xbox 360) has 8 achievements worth 100 gamerscore.
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"