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