Here is the full list of all 19 Perseverance: Part 3 achievements.
Refuse to drink through the game
Always choose the assault rifle when possible
Finish the game as both Jack and Karen
Befriend Roger
Go for the headshot 5 times
Reach the end
Get through Jack's story without dying
Always make sure the dead don't come back
Don't tell Hal about Karen
Find out about Ellen's old crush
Find flares and use them in battle
Finish the game without dying
Kill Murphy
Find the safe and open it
Finish off two dying persons
Finish the game as Dog
Always choose short firearms when possible
Betray Karen and tell the sheriff about her
Get whiskey from every possible place and don't give it to Mitch