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