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