Here is the full list of all 20 Late Shift achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Reject the offer
Watch all seven endings
Accept the offer
Pull the trigger
Find all main chapters
Convince Parr it's a fake
Watch four endings
Go to the Tchois
Fall for the bluff
Don't give in
Take the high road
Go home alone
Don't cross the line
The key to friendship
Don't fight
More than just friends?
Enter the wrong code
Defeat the odds
Split the share 50/50
What are the chances?