The Anger Management Add-on for Angry Birds Trilogy has 10 achievements worth 250 gamerscore.
Complete Classic Episode 7 (without the Mighty Eagle)
Complete Seasons Episode 8 (without the Mighty Eagle)
Complete Seasons Episode 9 (without the Mighty Eagle)
Complete Seasons Episode 10 (without the Mighty Dragon)
Complete Seasons Episode 11 (without the Mighty Eagle)
Complete Seasons Episode 12 (without the Mighty Eagle)
Get 3 stars in every single level of Anger Management
Get 100% Eagle score in every single level of Anger Management
Make 500 birds swim
Get 100% Dragon score in all levels of Seasons Episode 10