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