Here is the full list of all 23 Tell a Demon achievements.
A bargain with the demon goddess.
You tricked a demon and escaped without dire cost.
Death is not the end?
You unlocked the epilogue.
Two bodies instead of one in the catacombs.
It's the only way, isn't it?
You unlocked all of the Intrigue endings.
Now who's going to steer the plot?
Ouch.
Kalevel does not suffer fools.
Bargaining is something a demon does, Julius.
Or you tried. Kind of hard given your condition.
You were very brave back there.
Don't you know better than to bargain with demons?
Curiosity doesn't have to kill the cat...
Even oblivion is preferable to a bargain with Sakraia.
Time has not worn away your compassion.
Sometimes even fear has a use.
It's not your fault you're a shadow demon. Why not embrace it?
Sometimes, not much needs to be said.
If you remember nothing else, remember honor.
Nobody gets a happy ending.