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