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