Here is the full list of all 20 Arkham Horror: Mother's Embrace trophies - there are 19 bronze and 1 silver.
Completed "An Invitation".
Completed "Finding Meaning in the Stars".
Completed "What Was Lost is Never Found".
Completed "Herd of Algedi".
Completed "The Peculiar Monsieur Lanuit".
Completed "Unwelcomed Guests".
Completed "tendrils of Witchcraft".
Completed "A Morbid Dance in the Second Line".
Save Arkham from the Dark Young.
Steal Lanuit's trinket from his store.
Visit a Outhouse.
Use the same investigator for every scenario of the game.
Find the recipe in every scenario.
Kill 3 opponents in a single investigator's turn.
Use a Radithor on an investigator without any Conditions.
Use a Bromo Coffee when your Action points are full.
Commit suicide by smoking a cigarette.
Heal enemy with a Wild Cast.
Kill the Dark Young with a Birthling explosion.
Have 75 items in your Office Chest at one time.