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