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