Here is the full list of all 13 SIX SHOTS achievements.
Duty done.
You chose to leave and save the young girl.
You found the dead Hikers.
Never found.
Blow some shit up.
He probably played with matches too...
Blast through into the next part of the valley.
Level the playing field.
Take down Brett Parks no matter what the cost.
Find the Monocular.
Modern, but left unkempt.
Nobody's coming.
Keep your head down.