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