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