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