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