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