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