The Episode 4: Sons of Winter Add-on for Game of Thrones: A Telltale Games Series has 8 achievements worth 160 gamerscore.
Complete Episode 4.
Complete Chapter 7 of Episode 4
Complete Chapter 6 of Episode 4
Complete Chapter 5 of Episode 4
Complete Chapter 4 of Episode 4
Complete Chapter 3 of Episode 4
Complete Chapter 2 of Episode 4
Completed Chapter 1 of Episode 4