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