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