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