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.
Watch all seven endings
Fall for the bluff
Go to the Tchois
Go home alone
Watch four endings
Pull the trigger
Reject the offer
Find all main chapters
Take the high road
Convince Parr it's a fake
Don't cross the line
The key to friendship
Enter the wrong code
Defeat the odds
Accept the offer
Don't fight
Don't give in
More than just friends?
Split the share 50/50
What are the chances?