The Episode 3: The Last Place You Look Add-on for Minecraft: Story Mode - A Telltale Games Series has 7 achievements worth 200 gamerscore.
Complete Chapter 6 of Episode 3
Complete Chapter 5 of Episode 3
Chew the fat with Reuben
Complete Chapter 4 of Episode 3
Complete Chapter 3 of Episode 3
Complete Chapter 2 of Episode 3
Complete Chapter 1 of Episode 3