Here is the full list of all 33 LOST EMBER achievements.
Found a weird triangle-shaped thing
Found the golden Statue
Found 50 relics
Found and possessed 3 legendaries
Found a weird cube-shaped thing
Found 70 mushrooms
Played all animals.
Found a weird fashion-shaped thing
Found 50 mushrooms
Played 10 different animals.
Damaged over 20 remains from the old days
Triggered 20 memories
Found 25 relics
Found a legendary animal
Spread spores of each mushroom kind
Found a weird tube-shaped thing
Spent a bunch of time underwater
Found 30 mushrooms
Roll for a mile
Triggered 5 memories
Spent a bunch of time in the air
Found 5 relics
Found all mushrooms
Triggered all memories
Found all relics
Find all legendaries
Spent a bunch of time underground
Found a weird... shaped thing
Found a weird sphere-shaped thing
Found an odd mini-game
Got through the Flappy Duckling level
Unlock all other achievements
Had too many berries