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