The A Matter of Family Add-on for Batman: Arkham Knight has 8 achievements worth 150 gamerscore.
Destroy all Teeth, Balloons and Jack-In-The-Boxes.
Rescue your father.
Uncover the secret history of the park.
Free the hostages at the Ferris Wheel.
Defeat 15 enemies using any type of hacking.
Free the hostages at the Merry-go-round.
Free the hostages at the Ghost Ship.
Defeat 4 enemies within the duration of a single scare effect.