Currently it is still unclear what exactly is needed but so far it turns out that you have to choose mostly negative, lie to Eddy in Chapter 3 and choose at the end Alyson's memory. I recommend to do this achievement together with the
on your second playthrough. You need 2 playthroughs to get all achievements.
There is no indicator in the game how many negative choices you needed, so for the safe side I recommend to replay! the game from chapter 1 (not isolated mode!) and be negative as possible. You can skip a lot of cutscenes and save a lot of time.
Here is a list of all my negative choices during my playthrough. The remaining choices should not be any effect to any achievement in the game (as example Tessa at Graveyard)Chapter 1Ferry
- I don't care Ronan House - Puzzle Door
- Examine the door
- Open (door handle)
- Break down the door Ronan House - Balcony
- Must be nice to forget
- Is something wrong
- That book changed everything
- Couldn't find the time
- Stop making it about you Store
- Choose Alyson's memoryStore - Talk with Tessa (don't get any clues)
- We remembered details
- It's time to talk now
- April 2004
- You were mad she bailed on you Police station
- Eddy did his best for me Chapter 2Ronan House - Outside
- Choose Alyson's memoryCar Stop (Telephone conversation with the realtor)
- Let's do it Police station (After Archive Room)
- Are you kidding me?!
- She was struggling!
- So you called child services
- That's bullshit, Alyson!
- No, its not that easy Store (After the plushie Battle)
- You're swell too Graveyard - Totem
- Choose Tyler's memoryRonan House - Docks
- Even after what I did for you? Chapter 3Eddy's House - Talk with Michael
- Don't tell Michael about the Memories
- Won't do any good Police station
- I wanna forget
- I can't move on Fishing with Michael
- We're too different
- I was the kid who killed his mom Ronan House - Barn
- Break the Box with the crowbar and don't solve any puzzlesRonan House - Dock
- Choose Alyson's memory (Marry-Ann threatened Tyler)
If you need a visual guide I have create a 100% video guide for this game with all achievements, all collectibles and all choices. The second playthrough / bad choices start at 35:32 (Timeline in spoilers)