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