Here is the full list of all 63 Angels with Scaly Wings achievements.
See the true ending.
See Lorem's good ending.
See Lorem's bad ending.
Assemble the sphere.
Do well in all investigations in a single playthrough.
Beat Sebastian at his own game.
See Bryce's good ending.
See Anna's good ending.
See Anna's bad ending.
See Bryce's bad ending.
Interrogate Anna.
Do a thing.
Look at Bryce's magazine.
Examine Bryce's blanket.
Stretch your legs.
Meet with Emera.
Listen to a bunch of music.
See Adine's bad ending.
Keep the seashells.
Meet with Katsuharu.
See Adine's good ending.
Decide not to meet anyone or investigate 10 times.
See Remy's good ending.
See your first good ending.
Reject Bryce's invitation.
Acquire a map.
Follow Vara.
Have two messages waiting for you at the same time.
Get Adine to remove her headgear.
See the evil ending.
Play a prank on Bryce.
See the neutral ending.
Skip ahead 10 times.
Look at everything the store has to offer.
See your first ending.
See Remy's bad ending.
See what lies beneath the mask.
Meet with Kevin.
Return the eggs to the hatchery.
Do well on the third investigation.
Find a mysterious base.
Go to the portal.
Help Katsuharu.
Look at Anna's envelope.
Look at Remy's pictures.
Do well on the second investigation.
Find a mysterious orb.
Appreciate the landscape.
Acquire the bloody bandage.
Find a handful of dirt.
Interrogate Damion.
Answer Anna's questions correctly.
Wait for Remy until you get bored.
Bring Remy's books into the correct order.
Do well on the first investigation.
Refuse to help Bryce 99 times.
Learn a lot about fruits.
Waste a perfectly good batch of eggs.
Drink a mysterious liquid.
Take a dragon dose of medication.
Read a bunch of books.
Order the daily special.
Give Anna your blood.