Here is the full list of all 14 77 Oleander Avenue achievements.
You opened the door to Garrett's Bedroom. Didn't it hurt enough the first time?
You looked up and saw light between the stars.
You tried to jump over the garden wall.
You found the hidden room in the basement.
You've explored the entire house... except for one final room.
You've named a small, cast iron friend.
You believed, right until the end, that it was all in your head.
You risked your life to find out what was haunting her.
You gave her one final push. She answered with a Roar.
Even if you return, you can never really find you way back.
One word is all you managed to get out.
You gave her a piece of redundant advice.
You tried to save her all on your own.
You unlocked all 5 bonus scenes in the Final Route