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