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