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.
This suicide is not from the squad
Sometimes is what remains in the end
Better aim a good conduct
...but not in control
Nothing else to lose
Be smarter than a cheater
You are starting to get sick of this hospital
Can be how a story ends
Show that you know how to handle a woman
Proof of your investigative abilities
Cut your hand and make the pact
Celebrate the end!
Do you believe in them?
You are no ladiesman, are you?
Solve a problem using violence
Finish your work on time
Maybe...
Meet someone known on the other side of the world
Don't forget your toothbrush
Officially an outlaw
Save ?? and question ??
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