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