Here is the full list of all 10 Arthas 2 achievements.
Pass the prologue
You tore down all the flyers.
You found the cat.
You took mom to the cemetery.
You drained the oil from the tanks.
You stole all the juice bottles from the construction workers.
You've protected all the pals in the Angle..
You helped the Chinese take the chicken.
You have completed the main story.
You've come to your senses after a not-so-fresh bear.