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