Here is the full list of all 23 Alone in the crowd achievements.
You're a felon.
You've been chosen.
The world died.
There's nothing outside.
You might have hurt someone.
Humans = Evil.
The great meteor fell from the sky.
The fourth world war happened!
Living on the red planet.
Traveling through space on a BIG SHIP.
You've got bloody hands.
Wronged the wrong people.
Just another copy of... myself?
Half machine, half human.
Is this the real story?
A special card from the stranger