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