Here is the full list of all 24 Soul Gambler achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
You are starting to get sick of this hospital
Celebrate the end!
Do you believe in them?
Save ?? and question ??
Proof of your investigative abilities
Maybe...
Show that you know how to handle a woman
...but not in control
Nothing else to lose
This suicide is not from the squad
Solve a problem using violence
Can be how a story ends
Meet someone known on the other side of the world
Be smarter than a cheater
Officially an outlaw
Now you do know a bit more about the game's secrets
It's impossible to escape from your fate
Never give money to a stranger
Sometimes is what remains in the end
Don't forget your toothbrush
Better aim a good conduct
You are no ladiesman, are you?
Finish your work on time
Cut your hand and make the pact