In order to obtain this achievement, you must make all your friends hate you at the end of the game.
IMPORTANT: This achievement is not compatible with "Matchmaker" and "New Beginnings".
You should be mean with them at every possible occasion, and follow these crucial steps. Beware of spoilers:
*** Spoiler - click to reveal ***- When playing "Truth or Slap", when Ren is asked, say "He's lying!", then "He told me she liked her", and accept to slap him.
- When having to choose between helping Ren or Clarissa, choose Clarissa.
- In every occasion you get blamed for what you did on the cave, blame Jonas.
- In Harden Tower, when Ren and Jonas fight, don't side with either one, and when you have to choose a companion, choose Nona.
- When you go to Bridge Stand to send a signal that opens the Bomb Shelter, the ghosts will make you a proposition. Accept it, and as soon as the time loop ends, tell Jonas what you did. Also, when you reach the radio inside the cabin, tell Ren and Nona what you did.
- Inside the bunker, don't help Jonas with the tape recorder, and go through the blast door instead.
- When facing the ghosts underwater, don't leave through the back door. Save Clarissa.
If you meet these requirements, you'll obtain the achievement during the "stat count" before the credits.
For a guide on how to get all the ending achievements in the lowest number of playthroughs, click here