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
Don't fight
More than just friends?
Defeat the odds
Split the share 50/50
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
Watch four endings
Take the high road
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