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