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