Here is the full list of all 21 AER - Memories of Old trophies - there are 14 silver, 6 gold and 1 platinum.
Explore the Land of Gods.
Find the Ancient Llamba.
Complete the game.
Complete the The Monastery.
Find the statue of the crane.
Find the dwellings of the rift cult.
Speak to all of the spirit animals.
Discover all areas of the map.
Find the bones of an old beast.
Find the statue of the fox.
Find the ancient battlefield.
Find the chiseled stone map.
Find the giant birdshrine.
Complete the The Archives.
Find the statue of the deer.
Find the Crab Island.
Get some Lambaby love.
Step into the well.
Find Erin when she's gone.
Complete the Eventide Sanctuary.
Escape the collapsing cave.