Here is the full list of all 36 Lucy Got Problems achievements.
You were loyal to Tiamat till the very end
You have uncovered the secret of Tiamat's panties
You have successfully deceived Ellie
They are in the trees, Lucy! The trees!
Invoke the bleak doomed world covered in pixel censorship
Enact justice on the Seer
At least you didn't have to kill ten rats in the cellar...
You have touched them!
You have heard something very special
...came true!
You died in an endless bush
Throw a squirrel out 3 times
A warm welcome indeed
Die 5 times
It's NOT a cookie, you get it?!
Now it's safe here
You lost an expensive piece of army-issue equipment
Feel like a film school student
Turn the tide of the story in an unexpected way
Lovecraft was right
Survive the encounter with the horror
You have carefully stashed the elf girl
You have found the elves
You can no longer be an adventurer
You're problematic
What do you want, a medal?
Finish the story with your suit intact
Never thought you'll get this high!
Gee, this location is perfectly safe!
Escape the Liana one way or another