The Guardians of the Galaxy Vol. 2 Add-on for LEGO Marvel Super Heroes 2 has 5 achievements.
Complete the 'Awesome Mix Vol. 2' level with all Minikits unlocked
Damage the Abilisk using the Anulax batteries
Complete 'Awesome Mix Vol. 2'
Complete the 'Awesome Mix Vol. 2' level after achieving True Believer status
Play as Groot until Mr Blue Sky stops playing